Question

If the 11th and 13th terms of an A.P. are 35 and 41 respectively , then find its common

difference.​

Answer 1

Answer:

a+10d=34......(.1)

a+13d=41.........(2)

(2)-(1)

a+13d=41

-a-10d=-34

therefore , d=-7/3

Answer 2

Answer: d=3

Explanation:

11th term of AP is

35 = a +10d. ------1

13th term of AP is

41 = a +12d ------2

Subtract (1) and (2)

41 - 35 = a +12d - a -10d

6 = 2d

d = 3