Question

Find a8 in the arithmetic sequence with a1 = -7 And d = 0.5.

Answer 1

$a_1=-8 \\ d=0.5 \\ \\ a_n=a_1+d(n-1) \\ a_8=-8+0.5(8-1) \\ {} \ \ \ =-8+3.5 \\ {} \ \ \ \boxed{=-4.5}$