What does the graph look like
Answer:
Step-by-step explanation:
Arc length =
where x is the angle
∴ For this question, the arc length is:
Arc length 
Arc length =
9514 1404 393
Answer:
-108
Step-by-step explanation:
About the easiest way to do this for small values of n is to compute each of the terms using the given recurrence relation.

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<em>Alternate solution</em>
You recognize that the recurrence relation describes a geometric sequence with a first term of 4 and a common ratio of -3. The n-th term of a geometric sequence is ...

Then the 4th term will be ...

Step-by-step explanation:
x^2=9/49
√x^2=√9/49
x=+or-3/7