Answer:
5x^2+x+1
Step-by-step explanation:
Let <em>f(x)</em> be the sum of the geometric series,

for |<em>x</em>| < 1. Then taking the derivative gives the desired sum,

Answer:
9+20t
Step-by-step explanation:
Look at the terms and see which has t and which is a number when you see like terms, add them or subtract them together to get like terms.
Answer:
A
Step-by-step explanation:
Answer:
23.5 - 18.7 = x
Step-by-step explanation:
Isolate the variable