Given the following original function:
[tex]\text{ y = }\frac{\text{ 4}}{9x^4}[/tex]
Rewriting it will be:
[tex]\text{ }\frac{\text{ 4}}{\text{ 9}}x^{-4}[/tex]
Differentiating it will be:
[tex]\frac{4(-4)}{9}x^{-5}[/tex]
Simplifying it will be:
[tex]\text{ -}\frac{16}{9x^5}[/tex]
