How do you graph f(x)=x^5+2 using zeros and end behavior?

1 Answer
Mar 19, 2017

f(x) has a real zero at x~=- 1.148698 and an inflection point at (0,2)
f(x) is defined forall x in RR

Explanation:

f(x) = x^5+2

Consider: f(x) =0 -> x^5 = -2

:. x = root5(-2) = -1.148698 for x in R

Now consider, f(0) = 0^5 + 2= 2

f'(x) = 5x^4
f''(x) = 20x^3

Hence f''(0) = 0 -> f(x) has an infection point at (0, 2)

Finally realise , the domain and range of f(x) is (-oo, +oo)

These attributes of f(x) on the real xy-plane can be seen on the graph below.

graph{x^5+2 [-10, 10, -5, 5]}