Question

What is the fourth term in the expansion of (x + 2)7?

Answer 1

Plug in 4 for x and solve.

Answer 2

(x+2)^7

have you learned binomial theorem yet?

Answer 3

no its pascals triangle, i just need an answer. haha

Answer 4

and yes, (x+2)^7

Answer 5

To my understanding the answer still lies in my answer. Plug in 4 for x and just do the simple math from there.

Answer 6

4+2= (6)^7?

Answer 7

Right

Answer 8

thats 1,679,616. thats not one of the options

Answer 9

Hmmm...Try this http://www.purplemath.com/modules/binomial2.htm Scroll down to the third bullet point.

Answer 10

plug in 4 for x? i dunno about that, sounds a bit off to me

Answer 11

trying to recall the "pattern"
\[{{7}\choose{3}}x^4\ 2^3\]looks right to me