If the number of terms in the expansion of (1−2x+4x2)n, x≠0 is 28, – InterviewSolution

1.	If the number of terms in the expansion of (1−2x+4x2)n, x≠0 is 28, then the sum of the coefficients of all the terms in this expansion, is :
Answer» If the number of terms in the expansion of ${(1 - \frac{2}{x} + \frac{4}{x^{2}})}^{n}$ , $x \neq 0$ is 28, then the sum of the coefficients of all the terms in this expansion, is :

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