Question

what is thee 32nd term of the arithmetic sequence where a1=12 and a13= -60 A) -192 B) -186 C) -180 D) -174

Answer 1

To find 32nd term first find d using formula an = a1 + (n-1)d
Plug an = 13
a1 = 12 & n = 13 & find d , the again use this formula
for a32 = 12 + (32 - 1)*d