Question

The 5^th term of an AP is -3 and its common difference is -4. The sum of the first 10 terms is

(a) 50 

(b) -50 

(c) 30 

(d) -30

Answer 1

Correct answer is (b) -50

Let a be the first term of the AP.

Here. d = -4

Thus, the sum of its first 10 terms is -50.