# Posts by Ana.

Total # Posts: 4

**High School English**

How did The Masque of the red death show evil? Ive read it over and over and cant seem to find evil no where in this story.

**calculus**

Suppose the function f(x)=2x^3+ax^2+bx has a critical point at x=−1, for which f(−1)=−2. What is a, b?

**calculus**

Given the function g(x)= (3x) / (2+5x^2 ) find its region of increase and decrease. Give open intervals.

**calculus**

Specify the region over which the following function f(x) is increasing and the region where it is decreasing. f(x)= √-x Your answer should be either open intervals or the empty set ϕ.