(1+2x)7

Question

0

550

1

(1+2x)7 how to do this coeff. of x4 urgent

Guest Feb 6, 2015

+118723

+5

Best Answer

$$\\(1+2x)^7\\
$What is the term with $ x^4 \;?\\
7C4(2x)^4*1^3=7C4*2^4*x^4=35*16x^4=560x^4\\$$

so the coefficient of x^4 is 560

Melody Feb 6, 2015

Melody · Answer 1 · 2015-02-06T10:46:02

$$\\(1+2x)^7\\
$What is the term with $ x^4 \;?\\
7C4(2x)^4*1^3=7C4*2^4*x^4=35*16x^4=560x^4\\$$

so the coefficient of x^4 is 560