Answer:
127
Step-by-step explanation:
We started at 7
We keep going up 3
multiply
Now add
at the 40th term
Whats ur question? Are u trying to figure out x ?
We can use 3 facts:



So, to find our x and our y we can do:
So, now that we know our x and our y we can find our r.

You'll notice, though, that there were two solutions for
, which means we have a positive and a negative for our x. So:

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