Sum of n numbers Calculator

Sum of n numbers Calculator

Sum of Series in Javascript

Choose Sequences (K) = Σkk^2k^32k-1k(k+1)1 / k(k+1)k(k+1)(k+2)1 / k(k+1)(k+2)Number of terms (n) :

Sum of Series (Σ) :

Sum Calculator for subjects

 

The triangular numbers are given by the following explicit formulas:

$${\displaystyle T_{n}=\sum _{k=1}^{n}k=1+2+3+\dotsb +n={\frac {n(n+1)}{2}}={n+1 \choose 2},}$$

where ${\displaystyle \textstyle {n+1 \choose 2}}$ is a binomial coefficient. It represents the number of distinct pairs that can be selected from n + 1 objects, and it is read aloud as "n plus one choose two".

The first equation can be illustrated using a visual proof. For every triangular number ${\displaystyle T_{n}}$, imagine a "half-square" arrangement of objects corresponding to the triangular number, as in the figure below. Copying this arrangement and rotating it to create a rectangular figure doubles the number of objects, producing a rectangle with dimensions ${\displaystyle n\times (n+1)}$, which is also the number of objects in the rectangle. Clearly, the triangular number itself is always exactly half of the number of objects in such a figure, or: ${\displaystyle T_{n}={\frac {n(n+1)}{2}}}$. The example ${\displaystyle T_{4}}$ follows:

${\displaystyle 2T_{4}=4(4+1)=20}$ (green plus yellow) implies that ${\displaystyle T_{4}={\frac {4(4+1)}{2}}=10}$

Author. bigboss

RPN(Reverse Polish Notation) calculator

Javascript RPN Scientific Calculator

T : Z : Y : X :
	Degrees		Radians

        RPN(Reverse Polish Notation) calculator

 

information about RPN

reverse polish notation (RPN), otherwise called turn around Łukasiewicz documentation, Clean postfix documentation or basically postfix documentation, is a numerical documentation where administrators follow their operands, rather than Clean documentation (PN), in which administrators go before their operands. It needn't bother with any enclosures as long as every administrator has a proper number of operands. The depiction "Clean" alludes to the ethnicity of philosopher Jan Łukasiewicz, who created Clean documentation in 1924.

Practically unnoticed beyond Germany for a really long time, the primary PC to utilize postfix documentation was Konrad Zuse's Z3 in 1941 as well as his Z4 in 1945. Thusly, the converse Clean plan was again proposed in 1954 by Arthur Burks, Wear Warren, and Jesse Wright and was autonomously reevaluated by Friedrich L. Bauer and Edsger W. Dijkstra in the mid 1960s to decrease PC memory access and utilize the stack to assess articulations. The calculations and documentation for this plan were stretched out by the Australian scholar and PC researcher Charles L. Hamblin during the 1950s.

Author. bigboss

Aspect Ratio Calculator

Aspect Ratio Calculator

Enter values on the left side of the equation and one of the two values on the right side then click calculate

Enter the x1 value: Enter the y1 value:	=	Enter the x2 value: Enter the y2 value:
Ratio:

Ratio calculator

Information about ratios

In math, a proportion shows how often one number contains another. For instance, on the off chance that there are eight oranges and six lemons in a bowl of organic product, then the proportion of oranges to lemons is eight to six (that is, 8:6, which is identical to the proportion 4:3). Additionally, the proportion of lemons to oranges is 6:8 (or 3:4) and the proportion of oranges to the aggregate sum of natural product is 8:14 (or 4:7).

The numbers in a proportion might be amounts of any sort, like counts of individuals or items, or like estimations of lengths, loads, time, and so on. In many settings, the two numbers are confined to be positive.

A proportion might be determined either by giving both comprising numbers, composed as "a to b" or "a:b", or by giving simply the worth of their remainder

a/b. Equivalent remainders compare to rise to proportions.

Subsequently, a proportion might be considered as an arranged sets of numbers, a part with the principal number in the numerator and the second in the denominator, or as the worth signified by this portion. Proportions of counts, given by (non-zero) regular numbers, are normal numbers, and may here and there be regular numbers. At the point when two amounts are estimated with a similar unit, as is many times the situation, their proportion is a dimensionless number. A remainder of two amounts that are estimated with various units is known as a rate.

Author. bigboss

Empirical Rule Calculator

Empirical or 68-95-99.7 Rule Calculation

Enter all the numbers separated by comma[E.g: 13,23,12,44,55]

Total Numbers:

Mean (Average):

Standard Deviation:

Empirical Rule

Empirical Rule Calculator

 

Information about empirical rule

In measurements, the 68-95-99.7 rule, otherwise called the observational rule, is a shorthand used to recall the level of values that exist in a span gauge in a typical dispersion: 68%, 95%, and 99.7% of the qualities exist in one, two, and three standard deviations of the mean, separately.

In numerical documentation, these realities can be communicated as follows, where Pr() is the likelihood function,[1] Χ is a perception from a regularly circulated irregular variable, μ (mu) is the mean of the dissemination, and σ (sigma) is its standard deviation:

In the observational sciences, the supposed three-sigma basic guideline (or 3σ rule) communicates a customary heuristic that virtually all values are required to exist in three standard deviations of the mean, and subsequently regarding 99.7% likelihood as close to certainty is experimentally helpful.

In the sociologies, an outcome might be thought of "critical" on the off chance that its certainty level is of the request for a two-sigma impact (95%), while in molecule material science, there is a show of a five-sigma impact (99.99994% certainty) being expected to qualify as a revelation.

Author. bigboss

Scientific Calculator online for free

Scientific Calculator online for free

Online Scientific Calculator

Degrees Radians e

Scientific Calculator

 

Information about Scientific Calculator:-

When scientific calculators were originally marketed they normally had only four of five capabilities (addition, subtraction, multiplication, division and square root). Modern scientific calculators generally have many more capabilities than the original four or five function calculator, and the capabilities differ between manufacturers and models.

The capabilities of a modern scientific calculator include:

• scientific notation
• floating-point decimal arithmetic
• logarithmic functions, using both base 10 and base e
• trigonometric functions (some including hyperbolic trigonometry)
• exponential functions and roots beyond the square root
• quick access to constants such as pi and e
• In addition, high-end scientific calculators generally include:
• cursor controls to edit equations and view previous calculations (some calculators such as the LCD-8310, badge engineered under both Olympia and United Office keep the number of the previous result on-screen for convenience while the new calculation is being entered.[1])
• hexadecimal, binary, and octal calculations, including basic Boolean mathematics
• complex numbers
• fractions calculations
• statistics and probability calculations
• programmability — see Programmable calculator
• equation solving
• matrix calculations
• calculus
• letters that can be used for spelling words or including variables into an equation
• conversion of units
• physical constants

Author. bigboss

Age Calculator

Age Calculator

Advance Age Calculator - Calculate your age in years, months, days, hours, minutes, seconds

Select Date of Birth: Date :  Month :  Year :  You have been living for: In months

In days In hours In minutes In seconds Your next birthday will be in:  

AGE CALCULATOR!!!!!          

Different cultures have different ways of calculating a person's age. A common age system is used in the calculation of this calculator's results. In this system, the age increases with the birthday of the individual. If a person has lived for 3 years and 11 months, his/her age is 3, and he/she will turn 4 on his/her next birthday, which is one month from now. This age system is used in most western countries. In some cultures, age is indicated by counting years, including or excluding the current year, and some civilizations do not count years. 20-year-olds are equivalent to 21-year-olds, for example. Tradition has it that people in China are born at one year old and their ages increase at the Traditional Chinese New Year instead of their birthdays. As an example, if a baby was born two days before the Chinese New Year, he or she will be two years old while being only two days old.
Xoom Free Age Calculator If the beginning date is at the end of a month, the months and days output of this age calculator may be perplexing. Example: February 20 through March 20 is considered one month by everyone. To determine the age from February 28, 2015 to March 31, 2015, there are two ways to do it. Because 28 February to 28 March is one month, the answer is one month and three days. 28 February and 31 March are considered the end of the month if both dates are considered. Both outcomes of the calculations appear to be valid. Dates such as April 30 to May 31, June 30 to July 30, etc., are also affected. The inconsistency in the number of days in various months is to blame. In our calculations, the following factors were taken into account.

Author. bigboss

Country Languages

                        Country Languages

Information about languages!!!

A language family is a gathering of dialects related through drop from a typical familial language or parental language, called the proto-language of that family. The expression "family" mirrors the tree model of language beginning in verifiable etymology, which utilizes a similitude contrasting dialects with individuals in a natural genealogical record, or in an ensuing change, to species in a phylogenetic tree of developmental scientific categorization. Etymologists consequently depict the little girl dialects inside a language family as being hereditarily related.

As per Ethnologue there are 7,151 living human dialects circulated in 142 different language families. A living language is characterized as one that is the primary language of something like one individual. The language families with the most speakers are: the Indo-European family, with many generally communicated in dialects local to Europe (like English and Spanish) and South Asia (like Hindi and Bengali); and the Sino-Tibetan family, primarily because of the numerous speakers of Mandarin Chinese in China.

Lyle Campbell (2019) distinguishes a sum of 406 free language families, including language isolates.

Author. bigboss