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The sum of coefficients in the polynomial expansion of is

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-1

None of these

answer is B.

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Detailed Solution

The given expression:

Here, we will expand the given expression, for that, we will assume the coefficients in the polynomial expansion to be

We written as,

We will put the value of x as 1 on both sides of this equation.

On adding and subtracting the terms, we get,

The sum of the coefficients in the given polynomial expansion is equal to -1.
Hence, Option (2) is the correct answer.

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