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Chapter 12: Q 42. (page 825)

In Problems 39鈥� 44, find each sum.

鈭�k=1n4路3k-1

Short Answer

Expert verified

The sum of the given sequence is2路(3n-1)

Step by step solution

01

Step 1. Write the given information.

The given sequence is鈭�k=1n4路3k-1

02

Step 2. Find the sum.

a1=4,r=3

The formula for the sum is sn=a1(rn-1)r-1

sn=4(3n-1)3-1=4(3n-1)2=2路(3n-1)

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