Mathematics

Mathematics

Problem

Let the first three terms

2

,

p

and

q

, with

q \neq 2

, of a G.P. be respectively the

7^{\text{th}}

,

8^{\text{th}}

and

13^{\text{th}}

terms of an A.P. If the

5^{\text{th}}

term of the G.P. is the

n^{\text{th}}

term of the A.P., then

n

is equal to

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