Question

find the next three terms in the geometric system
4,-8,16,-32

Answer 1

In a geometric sequence, each term is the term before it multiplied by some number.
So if that number is r, then find r if 4*r = -8
Figure out what number that is then multiply that number by the last term to get the next.

Answer 2

thanks for your help but i still dont get it

Answer 3

multiply each term by (-2)

Answer 4

what times 4 = -8?
4 * -2, right?
So as you see with each term, -8 * -2 is 16
16*-2 is -32
So we figured out the pattern! Now just multiply -32 by -2 to find the next term.

Answer 5

ohhhhh thats what i was missing... because i had positive 2 instead of negative
thanks :)

Answer 6

No problem :)
Whenever you have alternating signs in a geometric series, that means that r is negative!

Answer 7

how about which number is next in the geometric system 40,100,250,625

Answer 8

Remember that in a geometric series each term is the term before it multiplied by a number. Just figure out what number that is then find the next term.
So 40*that number=100 what number would you multiply by 40 to get 100?

Answer 9

are you a teacher?

Answer 10

40*2.5=100

Answer 11

the answer is 1562.5? thats what i
got