What is the second term of (x+3) a. x^9 b. 3x^9 c. 9x^8 d. 27x^8

D. 27x^8

Step-by-step explanation:

what is the second term of (x+3)^9???

A. x^9

B. 3x^9

C. 9x^8

D. 27x^8

this expansion can be solved using pascal triangle or

the binomial expansion can be designated with the formula usin combination rule.

n=number of terms

let n=9

r=0

P=x

Q=3

P decreases n value while Q increases

n!/(n-r)!*r!

for the first term

9!/(9-0)!0! *x^9*3^0

for the second term

9!/(9-1)!1! *x^8*3^1

9*x^8*3

D. 27x^8

sure i'm up for it

step-by-step explanation:

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3