I'm guessing S^20 is actually referring to the 20th partial sum

, with

in the arithmetic case, and

in the geometric case.
(a) Combining like terms, we have

and invoking the formula

we end up with

(b) Multiply

by 1.1, then subtract this from

:


Answer:
D!
Step-by-step explanation:
The answer is 2 units right 3 units up
Answer:
528
Step-by-step explanation:
PEMDAS:
In this math problem, you would multiply 34 and 15 before adding 18.

<em>Brainliest Appreciated. </em>