In an arithmetic progression the first term is 11 and its common difference is 2 If the general term...........

Quantitative Aptitude ( CCS) Arithmetic progression

In an arithmetic progression the first term is 11 and its common difference is 2. If the general term is (a_n) , find a_12 - a_5.

Given a = 11 and common difference = 2.
General Term a_n = a +(n-1)d a_n
= 11 + 2(n-1) = 2n + 9 a_12
= 24 + 9=33 a_5 = 10 + 9
= 19 a_12 - a_5 = 14

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