yang bisa tolong dong bantuannya....pakai caranya juga ya....

a.
f (x) = [tex] x^{3} -7 x^{2} +2 [/tex]
f' (x) = [tex]3.x^{3-1}- 2.7 x^{2-1}+ 0.2.x^{(0-1)}\\ = 3 x^{2} - 14x + 0 = 3 x^{2} - 14x[/tex]

b.
g(x) = [tex]6 - \frac{1}{5} x^{5} + \frac{1}{9} x^{9} [/tex]
g' (x) = [tex]0.6. x^{0-1} - 5.\frac{1}{5} x^{5-1} + 9.\frac{1}{9} x^{9-1}\\ =0 - x^{4} + x^{8} = x^{8} - x^{4}[/tex]

c.
h(x) = [tex] ax^{2} + bx + c[/tex]
h'(x) = [tex]2.ax^{2-1} + 1.b x^{1-1} + 0.c. x^{0-1}\\ = 2ax + b + 0\\ = 2ax + b[/tex]

d.
f(x) = [tex]\frac{4}{ \sqrt{x} } = 4. x^{-\frac{1}{2} }[/tex]
f'(x) = [tex]-\frac{1}{2}.4. x^{-\frac{1}{2}-1}\\ = -2 x^{-\frac{3}{2} }[/tex]