1.

5th term of an A.P. is 10 more than its 3rd term. What is the difference of its 9th and 6th terms ?(1) 15 (2) 3 (3) 6 (4) 10

Answer»

Correct option: (1) 15

Explanation:

a5 = 10 + a3

a + 4d = 10 + a + 2d

2d = 10

d = 5

a9 – a6 = a + 8d – (a + 5d)

= 3d = 3 (5) = 15



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