Question

pre-calc help!
picture is attached!!

Answer 1

You first can tell that it will be a factor of 8, since the first one is 8. Then, since the first one is 8, the exponent must be (n). This means that the first time, there is a 5^0, which is 1. Now, for the +/- switching, we know that it must be a multiple of -5, since that is the factor in between each turn. So the answer must be B.

Answer 2

how would i solve this:
Find the sum of the first 12 terms of the sequence. Show all work for full credit.

1, -4, -9, -14, . . .

Answer 3

@BTaylor

Answer 4

please help!!! @BTaylor

Answer 5

@badi

Answer 6

@@hartnn @TuringTest

Answer 7

@ajprincess @.Sam.

Answer 8

Find the sum of the first 12 terms of the sequence. Show all work for full credit.

1, -4, -9, -14, . . .

Answer 9

This is an a.p.
Do u knw hw to find the sum of an arithmetic progression?

Answer 10

no

Answer 11

@ajprincess

Answer 12

\[S_n=\frac{ n(a+l )}{ 2 }\]
This formula is used to find the sum of n terms. Here
a-first term
l-last term of the series.
12th term is ur last term.
so to find it use the following formula.
\[T_{12}=a+(n-1)d\]
d-common difference.
d=-9-(-4)
=-9+4
=-5
n=12
a=1.
Can u do it @Sammy90210?

Answer 13

no im confused. can u show me on this one, i have many more like this to do

Answer 14

Let me guide u step by step.
d-common difference. It can be found by finding the difference between the two terms.
Let me take the first term nd second term.
d=-4-1
=-5
n=12
a=1
Plugging the values in
\[T_{12}=a+(n-1)d\]
\[=1+(12-1)*-5\]
\[=1+(11*-5)\]
\[=1-55\]
\[=-54\]