Select the expression that is equivalent to (x+4)? о
A. x2 + 4x + 16
O
B. x2 + 8x2 +16
O c. x2 + 8x+16
O D. 2x + 8x + 16

C. x^2 + 8x +16

Step-by-step explanation:

(x+4)(x+4)

+4x+4x+16

+8x+16

A. x^2 + 4x + 16 -> No! they did not add the two 4x

B. x^2 + 8x^2 + 16 -> No! they added the two 4 but they seem to have multiple the xs

C. x^2 + 8x + 16 -> Yes! it's the same results we got when we solve it

D. 2x + 8x +16 -> No! they added the two Xs.

geometric series converge the common ratio r has magnitude less than one.

which is equivalent to

for the example we need

|2-x| < 1

-1 < 2-x   and 2-x < 1

x < 3 and x > 1

we can write that

answer: 1 < x < 3

1a. common ratio r=250/25=10 > 1     diverges

1b.   r=50/100=1/2 converges

when these converge they converge to

where a is the first term.

answer: 200

1c. r=-1   so it's not the case that |r| < 1.     diverges

2a. x is the common ratio so we converge when |x|< 1

2b.   r=-10x / -2 = 5x.

we converge when

|5x| < 1

|x| < 1/5

2c.   r=3-2x

-1 < 3-2x and 3-2x < 1

-4 < -2x and 2 < 2x

x < 2 and 1 < x

1 < x < 2

2d. [/tex] r=-48x^3/12 = 4x^3[/tex]

|4x^3| < 1

|x^3| < \frac 1 4

|x| < 4^{-1/3}