Find the coefficient of x4 in the expansion of (3x - 2)6
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I must assume you're familiar with the Binomial Expansion. Find the coefficient of in the expansion of The term we seek is: .
The coefficient is 4860.
Originally Posted by maptorren Find the coefficient of x4 in the expansion of (3x - 2)6 Use the binomial theorem:
Substitute 3x for a, and 2 for b
Soroban is correct.. 4860 is your coefficient.
Using the factorial form of the binomial theorem, you want to find the 3rd term of .
Find the 3rd term when k=2,
what about when you have something like find the coefficient of x^4 in the expansion of (3x -1/x)^6.
Last edited by maptorren; Jul 29th 2008 at 12:55 PM.
how would i solve this porblem
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