Question

which term of the Ap 3,8,13,18,...is88?

Answer 1

23,28,33,38,43,49,54,59,64,69,74,79,8489

Answer 2

a1 = 3 , a2 = 8

d= 8-3= 5, an=88

an= a+(n-1)d

88= 3+(n-1)5

88=3+5n-5

88-3=5n-5

85=5n-5

85+5=5n

90=5n

90/5=n

n=18

hence the 18th term of this ap is 88.