Question

Write the sum using summation notation, assuming the suggested pattern continues.

-4 + 5 + 14 + 23 + ... + 131

Answer 1

This is my answer.
\[\sum_{n=0}^{15} (-4+9n)\]

Answer 2

What's the difference between finite and infinite?

Answer 3

Like how do I determine if it is infinite or finite?

Answer 4

Your answer is correct. And it's finite, because upper limit is not infinity.

You have infinite series if you have something like \(\displaystyle\sum_{i=0}^\infty\dfrac1i\) (See the infinity symbol?)
Is that's what you are asking?

Answer 5

Infinite series is series where you have to add and add and add, perform addition indefinitely.