Find each sum.

7+12+17+...+2+5n

Short Answer

Expert verified

The sum of the given sequence is9n+5n22.

Step by step solution

01

Step 1. Given information

Thegivensequenceis7+12+17+...+2+5n.

We have to find the sum of the sequence.

02

Step 2. calculating the sum

ThesumofthearithmeticsequenceisgivenasSn=na1+an2Wehave,a1=7an=2+5nThus,Sn=n7+2+5n2=n9+5n2=9n+5n22

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