Question

The 12th term of an AP is double the 5th term. Find the common difference, give thhat the first term is 7.

Answer 1

a= 7 (given),

T12 = 2 × T5,

a+(12-1)d = 2 × [a+(5-1)d],

a+11d=2a+8d,

then

11d-8d=2a-a,

3d=a,

3d=7,


then

d=7/3

Answer 2

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