1.

The 6th and 20th terms of an AP are 8 and −20 respectively. Find the 30th term. (a) −34 (b) −40 (c) −32 (d) −30 

Answer»

Correct option (b) −40

Explanation:

a + 5d = 8 and a + 19d = −20. Solving we get 14d 

= −28 → d = −2. 30th term = 20th term + 10d 

= −20 + 10 × (−2) = −40. 



Discussion

No Comment Found

Related InterviewSolutions