Answers

2016-01-17T12:50:49+05:30
The answer is a)3. f(x)=1/x+ax=(1+ax^2)/x f(1/5)=28/5 That implies, [1+a(1/5)^2]/(1/5)=28/5 Solving the equation you will get a=3 *'^' means to the power of.
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2016-01-17T12:53:22+05:30
F(x) = 1/x +Ax
f(1/5) = 28/5
x = 1/5
⇒ 1/(1/5) + A× 1/5 = 28/5
⇒  5 + A/5 = 28/5
⇒ (25 +A)/5 = 28/5
⇒ 25 +A = 28/5  × 5
⇒ 25 + A = 28
⇒  A = 28 - 25
∴ A = 3
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