hey guys, just need to check if my working out and solution is correct.

Find the coefficient of in the expansion

My solution

So:

now since we need to find coefficient of , therefore .

so = =

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- May 19th 2010, 12:15 AMjvignacioBinomial theorem question check
hey guys, just need to check if my working out and solution is correct.

Find the coefficient of in the expansion

**My solution**

So:

now since we need to find coefficient of , therefore .

so = = - May 19th 2010, 12:23 AMmr fantastic
- May 19th 2010, 12:32 AMjvignacio