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If and and , then find , then find .

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answer is C.

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Detailed Solution

Concept- The value of the needed expression may be determined by expanding

. By swapping the values of the terms given in the expansion, we may obtain the needed equation.
The expression,

occurs in the expansion of the formula

, so we will use this expansion to find out the value of the required expression.

equation (1)
Rearrangement of equation 1 gives,

equation (2)
We now substitute the values of

and a b in equation (2) , we get,

Hence, the value of

is 13 .
Hence, the correct answer for this question is option (3) .

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