Answer:
21x²
Step-by-step explanation:
hopefully A is a typo
Answer:32-10x
Step-by-step explanation:
Answer:
OPTION B
Step-by-step explanation:
Geometric series : 
where
is the first term of the series and
is common difference.
A geometric series is convergent if |r| < 1.
It is divergent otherwise.
Since the first term of the series is a and the second term is ar, the ration of second term and first term,
= r.
OPTION A:
.
Here,
and 

r > 1. So, this series is divergent.
OPTION B:

a = 1; ar =
.
.
Since, r < 1, we can say that the series is convergent.
OPTION C:
We can easily see that |r| =4. So, it is not convergent.
OPTION D:
Again |r| = 2. So, the series should be divergent.
Answer:
up 25%
Step-by-step explanation:
it went increased by 25% from the beginning point
Answer:

Step-by-step explanation:
2x * 2x * 2x would get the 8x^3
the -3 * -3 * -3 would get the -27
if you do all the other multiplications -36x^2 and 54 X would result