What is the inflection x^4-8x^2 ?

The inflection x^4-8x^2 is (-2/(sqrt(3)),-80/9),(2/(sqrt(3)),-80/9)

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inflection x^4-8x^2

inflection points

x^{4} - 8 x^{2}

(- \frac{2}{3}, - \frac{80}{9}), (\frac{2}{3}, - \frac{80}{9})

Solution steps

f^{''} (x) = 12 x^{2} - 16

Find intervals:

Concave Upward

: - \infty < x < - \frac{2}{3},

Concave Downward

: - \frac{2}{3} < x < \frac{2}{3},

Concave Upward

: \frac{2}{3} < x < \infty

Plug

x = - \frac{2}{3}

into

x^{4} - 8 x^{2} : - \frac{80}{9}

(- \frac{2}{3}, - \frac{80}{9})

Plug

x = \frac{2}{3}

into

x^{4} - 8 x^{2} : - \frac{80}{9}

(\frac{2}{3}, - \frac{80}{9})

(- \frac{2}{3}, - \frac{80}{9}), (\frac{2}{3}, - \frac{80}{9})

What is the inflection x^4-8x^2 ?
The inflection x^4-8x^2 is (-2/(sqrt(3)),-80/9),(2/(sqrt(3)),-80/9)