Question

The first term of an AP is 6 and 21st term is 146. Find the common difference

• A. 6
• B. 5
• C. 7
• D. 8

Answer 1

Answer:

C. 7

a=6,a+ 20d =146 6 + 20d = 146 [tn = a + (n-1)d] 20d=140 d= 140/20 = 7