one of the terms in the expansion is . determin the value of k.

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- May 29th 2005, 12:49 PMkelseypolynomial expansion
one of the terms in the expansion is . determin the value of k.

- May 29th 2005, 04:18 PMMath Helpfinding the pattern

The pattern of coefficients is like pascals triangle, the outside is always 1's and you add the two coefficeints in the line directly above to get the inside ones:

...1 1

..1 2 1

.1 3 3 1

1 4 6 4 1

As for the 3 (or y value see above) when you are talking about a power of 7 the power of the y will always be 7 - power of x in that part of the polynomial.

Try to figure it out and post the solution if you can't get it or if you want me to check it I will give the answer. - May 29th 2005, 05:55 PMkelseyi think i got it
the next line would start with so the coefficient or the k value would be 1.

- May 29th 2005, 06:26 PMMath Help
yes but the next line is to the power of 5, you are asking about power of 7. so the k you are after is actually different.

- May 29th 2005, 07:01 PMkelseythink i got it
so then if it was like the trangle it would be like 7 chose 2 or 21

- May 30th 2005, 07:59 AMMath Help
21 is correct but that is not k.

you also need the 3 or y component.

or