If the 6th term of an arithmetic progression is 11 and the first term is 1, find the common difference.

A.

\(\frac{12}{5}\)

B.

\(\frac{12}{5}\)

C.

-2

D.

2

View answer & explanation

Correct answer is D

In an AP, Tn = a + (n - 1)d

T6 = a + 5d = 11

The first term = a = 1

∴ T6 = 1 + 5d = 11

5d = 11 - 1

5d = 10

∴ d = 2

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