Question

the first three term of a sequence are -2,4 and -8.if each subsequent term is the product of the proceeding two terms ,how many of the first 90 terms are negative?

Answer 1

half of them are positive, the other half are negative

Answer 2

how? explain plz

Answer 3

@jennyjewell25

Answer 4

??????

Answer 5

do u know how to solve it?

Answer 6

you would you mention me i cant even do my own work thats why im on here at 2:36 am lol

Answer 7

@sirm3d

Answer 8

First term = -2
Second term = 4
Third term = -8

For each 2 positive numbers, there is a negative number, or in every triplet of numbers, there is 1 negative number.
In 90 numbers, there will be 30 triplets of 3 each because 30*3=90
So in case in each triplet there is 1 negative number, how many negative numbers will you have in 30 triplets?

Answer 9

10?

Answer 10

Yes.