Question

In an A.P first two terms are -3,4, then 21 st term is

a) -143


b) 143


c) 137

d) 17​

Answer 1

Answer:

-143 is the answer of your question

Answer 2

Answer:

Given,

a1=2

a2 = 4

d=a2-a1

d=4-(-3)

d=4+3

d=7

a21=a+20d

=-3+20×7

=-3+140

=137

hence the right answer is c) 137