For an arithmetic sequence where a1 = 17 and the common difference is 5, find s7. a. 229 b. 235 c. 224 d. 219 show steps 11 points

C. 224

Step-by-step explanation:

Given : The first term of an arithmetic sequence =

Common difference :

We know that the sum of first n terms is given by :-

Now, for n=7 we have

step-by-step explanation:

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