Question

If 3.4.,p,q,r ,7.4 are in A.P,,then value of r is ? ​

Answer 1

Answer :-

r = 6.4

Expln :-

In seq.

a = 3.4 , t2 = p , t3 = q, t4 = r, t5 = 7.4

t2 = a+ d = p

t3 = a+2d = q

t4 = a+3d = r ..(1)

t5 = a+4d = 7.4

3.4 + 4d = 7.4

4d = 7.4 - 3.4

4d = 4

d = 1 in (1)

t4 = a+3d

r = 3.4 + 3(1)

r = 6.4