Binomial Theorem

What is the Coefficient of the 8th Term of the Expansion of (2x - 1/x)^10?

Problem
In the expansion of (2x - 1/x)10, find the coefficient of the 8th term.

A.   980 C.   960
B.   970 D.   990

 

Find the term independent of x in the expansion of a given binomial

Problem
Find the term that is independent of x in the expansion of $\left( 2 + \dfrac{3}{x^2} \right)\left( x - \dfrac{2}{x} \right)^6$.

A.   180 C.   -140
B.   160 D.   -160

 

 
 
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