Question:`a = b^2` হলে  f(2) = কত? 

A `6b^2` 
B `4b^2` 
C 4a 
D 5a 

+ Answer
A 

+ Explanation
f(2) = `a.2^2 + b^2.2 = 4a + 2b^2`

    `a = b^2` হলে f(2) =`4b^2 + 2b^2 = 6b^2`

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Irin Moni

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