Question

Maffs question. Halp pls http://prntscr.com/2uk472

Answer 1

18, x, 8

In a geometric sequence, there is a constant ratio between consecutive terms.

That means x/18 must be equal to 8/x.

x/18 = 8/x

Solve for x by cross multiplying.

Answer 2

So 12 right? because \[\frac{ x }{ 18 }=\frac{ 8 }{ x }\]
Then\[18*8=x^2\]Then \[144=x^2\]
Then \[\sqrt{144}=\sqrt{x^{2}}\]
Lastly \[12\]

Answer 3

That is what I get.

Answer 4

I meant \[12=x\]

Answer 5

Yeh.

Answer 6

Thanks

Answer 7

You are correct. The missing number in the sequence is 12.