Question

An arithmetic sequence has a first term of 10 and a common difference of 4.

Answer 1

The sum of 18 terms is 792.

What is an Arithmetic Sequence ?

An arithmetic sequence is defined as the sequence of numbers in which the difference between two consecutive terms is same.

First Term is 10

Common Difference = 4

The partial sum of the arithmetic sequence is given by

$\rm S_n = \dfrac{n}{2}( 2a+(n-1)d)$

Here a is the first term , d is the common difference

$\rm S_n = \dfrac{18}{2}( 2*10+(18-1) * 4)$

Therefore the sum of 18 terms is 792.

To know more about Arithmetic Sequence

brainly.com/question/15412619

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