Find the radius of convergence, R, of the series. ∞
xn + 1
2n!

n = 2
R =

Find the interval, I, of convergence of the series. (Enter your answer using interval notation.)
I =

Two lines that do not intersect are skew. always sometimes or never

The table above shows approximate conversions from gallons to liters. what is the value of x?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.