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Mathematics 37 Online
LemonNotFound:

A geometric sequence is shown. Fill in the missing terms for the geometric sequence. What is the common ratio for this geometric sequence? __, -11, 22, __, 88, -176 Common ratio: __

AZ:

If it's a geometric sequence, that means the next term is found by multiplying by a constant number

AZ:

So to find the common ratio, we take two terms that are next to each other and divide -176 / 88 = ?? 22 / -11 = ?? that's our common ratio

AZ:

it should be the same number if it is indeed a geometric sequence

AZ:

what do you get for the common ratio?

LemonNotFound:

-2

LemonNotFound:

Thank you

AZ:

Good! That's our common ratio so now if you notice, the number that comes after gets multiplied by -2

AZ:

so we went from 11 to -22 we multiplied 11 by -2 to get -22 to find the next number, we have to multiply -22 by -2 so what is -22 * -2 =

LemonNotFound:

44 and -11/-2 = 5.5

AZ:

You got it! Well done :)

LemonNotFound:

thank you

AZ:

It was my pleasure :)

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