Question

If the 3rd and 7th terms of an a.p. are 17 and 27 respectively, then the first term of the a.p is



A)9 B)12 C)14 B)16

Answer 1

The First Term of An A.p is 12

Answer 2

Answer:

17= a +2d. (1)

27= a +6d. (2)

(2)-(i)

-10=--4d

d: 10/4 = 5/2

17=a+2d

17=a+5

a=12

Ans(B) 12