For an arithmetic sequence where a1 = 17 and the common difference is 5, find s7. A. 229 B. 235 C. 224 D. 219 please show steps 11 points
Accepted Solution
A:
Answer:The correct answer is C. 224
Step-by-step explanation:
Sn = n/2 (2*A1 +d(x-1))S7=7/2(2*17+5(7-1))S7=7/2(34+30)S7=7/2(64)S7=7*64/2S7=7*32/1S7=224Hope This Helps, If So Mark As Brainliest! :)