Can somebody please explain to me what is meant by the following question:

If , find .

Thanks.

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- January 30th 2009, 04:39 PMdrguildoConfusing Question
Can somebody please explain to me what is meant by the following question:

If , find .

Thanks. - January 30th 2009, 05:09 PMGreenb

Multiply the parantheseses and you should get the constants (A,B,C....) infront of each x^n value where n=0,1,2,3,4,5.

Hope I helped you somewhat :) - January 30th 2009, 05:23 PMChop Suey
You can use Binomial Theorem/Pascal's Triangle to expand. Look them up if you're not familiar with it.

To start you off:

- January 30th 2009, 05:55 PMdrguildo
I'm more confused than when I posted the question. It's like I'm so confused that I don't even know what I'm confused about. (Headbang)

The question is from a book on basic algebra. The point the question is asked is before multiplying out parenthesis has been covered.

The answer states:

Letting one gathers that .

This doesn't make any sense to me. Why 1? Why not 20:

Should I learn from a different book? This is not the first time there's been a question like this. - January 30th 2009, 06:07 PMChop Suey
Oh wow I can't believe I went about it methodically without thinking a bit more.

This equality is supposed to hold for all x. If we input x = 1, we managed to make the right side into the expression in question. The left side would result in:

Nah, your book is fine so far. You did not need to multiply nor did you need Pascal's triangle *slaps forehead*