1.

What is the sum of the coefficients of all the terms in the expansion of `(45x-49)^(4)` ?A. `-256`B. `-100`C. 100D. 256

Answer» Correct Answer - D
Given expansion is `(45x-49)^(4).`
To find the sum of the coefficients of all the terms in the expansion, we have to put x=1 in the expansion.
Thus, required sum of coefficients `=(45-49)^(4)`
`=(-4)^(4)=256`


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