Homework Help: Math

Posted by Ed on Monday, January 10, 2011 at 12:16pm.

Using the binomial theorem, Find the first three terms in the expansion of (x-(1/x))^5.

My solution:
C(5,0)x5 + C(5,1)(x4)(-1/x) + C(5,2)(x3)(-1/x)2
x5 + (5)(x4)(-1/x) + 10(x3)(-1/x)2
x5 + (-5x4/x) + 10(x3)(1/x2)
x5 + (-5x3) + 10(x)
x5 -5x3 + 10x

The first three terms are x5, -5x3, and 10x, respectably.

Is this right? Thanks a lot.

Math - Reiny, Monday, January 10, 2011 at 12:28pm
I agree.

Answer this Question

Related Questions

Math - Using the binomial theorem, Find the first three terms in the expansion ...
Linear Algebra - Express the solutions of the following systems in terms of the ...
Statistics - Suppose X1;X2;...;X5 is a random sample from a n(0; variance) ...
Math - Find the augmented matrix for each of the following systems of linear ...
math-check my work - Differentiate y=x(x4+5)3 d/dx = [x(x4+5)3] d/dx = [f(x)g(x...
math - thank you so much reny! but i was wonndering how can you factor x8-2x6+x5...
Pre-Algebra - X5 x X4
Math - Use factorization to simplify the given expression in part (a). Then find...
Math - Hi: I was wondering how I would even start to solve a problem like this. ...
Math - Is this equation right is it worked correctly x 1 ----- - -------- x2-4 ...

For Further Reading

First Name:
School Subject:
Answer: