Question

find 15 th term of ap if first term is -3 and common difference is -7​

Answer 1

Answer:

a3= -3

d= -7

a3= a+2d

-3= a+ 2 x (-7)

-3= a -14

a= -3+14

a= 11

a15= a+14d

a15 =11+ 14 x -7

a15 = -87