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Chapter 12: Q 121. (page 1185)

In the following exercises, find each sum.

鈭�i=135-6i-2

Short Answer

Expert verified

The obtained arithmetic sum is -3850.

Step by step solution

01

Step 1. Given Information.

Consider the given sum:

鈭�i=135-6i-2

02

simplify the sum. 

Express the sum and find identify values.

鈭�i=135-6i-2=-61-2+-62-2+-63-2+鈰�+-635-2=-8-14-20-鈰�-212=a1+a2+a3+鈰�+an

03

Step 3. Find the sum.

Substitute the values in the sum of the n-terms formula Sn=n2a1+an.

S35=352-8-212=352-220=-35110=-3850

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Most popular questions from this chapter

In the following exercises, expand each binomial using Pascal's Triangle.

(x+y)4

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a1=-13andd=6

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1,2,4,8,16,32,鈥�

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Find a general term for the sequence whose first five terms are shown.

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