If the first, second and last term of an A.P. are a, b and 2a respecti – McqOptions

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1.	If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is
A.	$\frac{{ab}}{{2\left( {b - a} \right)}}$$
B.	$\frac{{ab}}{{b - a}}$$
C.	$\frac{{3ab}}{{2\left( {b - a} \right)}}$$
D.	one of these
Answer» D. one of these

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