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answer:

Often mathematical formulae require the addition of many variables Summation or sigma notation is a convenient and simple form of shorthand used to give a concise expression for a sum of the values of a variable. Let x1, x2, x3, … xn denote a set of n numbers. x1 is the first number in the set.

Sigma notation is a method used to write out a long sum in a concise way. ... use rules to manipulate sums expressed in sigma notation.

A series can be represented in a compact form, called summation or sigma notation. The Greek capital letter, ∑ , is used to represent the sum. The series 4+8+12+16+20+24 can be expressed as 6∑n=14n . The expression is read as the sum of 4n as n goes from 1 to 6 .

denote a set of n numbers.

Step-by-step explanation:

Sigma is fun to use, and can do many clever things. Learn more at Sigma Notation.

You might also like to read the more advanced topic Partial Sums.

All Functions

Operators

 +Addition operator

 -Subtraction operator

 *Multiplication operator

 /Division operator

 ^Power/Exponent/Index operator

 ()Parentheses

Functions

 sqrtSquare Root of a value or expression.

 sinsine of a value or expression

 coscosine of a value or expression

 tantangent of a value or expression

 asininverse sine (arcsine) of a value or expression

 acosinverse cosine (arccos) of a value or expression

 ataninverse tangent (arctangent) of a value or expression

 sinhHyperbolic sine of a value or expression

 coshHyperbolic cosine of a value or expression

 tanhHyperbolic tangent of a value or expression

 expe (the Euler Constant) raised to the power of a value or expression

 lnThe natural logarithm of a value or expression

 logThe base-10 logarithm of a value or expression

 absAbsolute value (distance from zero) of a value or expression

 factthe Factorial function!

Constants

 piThe constant π (3.141592654...)

 eEuler's Number (2.71828...), the base for the natural logarithm

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

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step-by-step explanation: