Question

Consider the sequence 2,6,18,54,...
Let n = the term number in the sequence.
Let A(n) = the value of the nth term of the sequence.
What is the comon ratio of the sequence.?

Complete each statement.
a. A(1) = 2 = 2 x 3^?
b. A(2) = 6 = 2 x 3 = 2 x 3^?
c. A(3) = 18 = 2 x 3 x 3 = 2 x 3^?
d. A(4) = 54 = 2 x 3 x 3 x 3 = 2 x 3^?
Thanks! (: Medals will be given lol.

Answer 1

The x's are mutiplication and you dont know the exponets.

Answer 2

if a,b,c form a GP

Then common ratio is given by

r=b/a=c/b

Answer 3

now can u tell the common ratio here?

Answer 4

I know the common ratio is 3, I don't know how to do the bottom./:

Answer 5

nth term of a GP is given by ar^(n-1)

where a is first term and r is common ratio ..i hope u can do it now :)

Answer 6

Oh okiee. Thanks.

Answer 7

yw :)