For an arithmetic sequence where a 1 = 17 and the common difference is 5, find s 7 . A. 219 B. 235 C. 229 D. 224

asked Jan 11, 2019 106k views

1 vote

For an arithmetic sequence where a 1

= 17 and the common difference is 5, find s 7
.
A. 219
B. 235
C. 229
D. 224

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0 votes

s7 = (7/2)[2*17 + (7-1)*5]

= 3.5 * (34 + 30)

= 3.5 * 68 = 224 answer

D

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5 votes

The correct answer is C. 224

I Bajwa PHD answered Jan 16, 2019

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