If the sum of first ten term of Ap is 4 times the first five terms then find ratio of the first term to common difference
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5(2a+9d)=5[2(2a+4d)]
=2a+9d=4a+8d
=d=2a
=d/a=2 ==> a/d = 1/2
First term : common difference
= 1 : 2
=2a+9d=4a+8d
=d=2a
=d/a=2 ==> a/d = 1/2
First term : common difference
= 1 : 2
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