A radio station requires DJs to play 2 commercials for every 10 songs they play. What is the unit rate of songs to commercials ?
2 answers:
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The next term is double the previous term, so that the -th term is given recursively by
This rule tells us that
and so on, with the explicit rule
for .
If 512 is the -th term in the sequence, then
One way is that you can just factor it out: (x+2)(x+2)(x+2)
For the first pair, you get
.
Then do
*
That will be
So the answer is 6
For the first pair, you get
Then do
That will be
So the answer is 6