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Binomial Theorem

Binomial Theorem

IP 4

The coefficient of \(x^2\) in \[(1+ax)(1+2x)^4\] is zero.

  1. Find \(a\).

  2. Using this value of \(a\), find the coefficient of \(x^3\).

Solution:

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Answer:(a) \(a=-3\); (b) \(-40\).

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