# How do you find the x coordinates of all points of inflection, final all discontinuities, and find the open intervals of concavity for #y=-x^5+2x^3+4#?

##### 1 Answer

Jun 24, 2018

No discontinuities.

Points of inflection at

CCU on (inf,

CCD on (

#### Explanation:

By power rule we can find second derivative to be

Setting equal to zero we can find Possible Inflection Points

Testing concavity between points using