R1 2011 vår LØSNING
Fra Matematikk.net
DEL 1
Oppgave 1
a)
<tex>O(x)= \frac{500}{x} + 8x^2 \\ O(x) = 500x^{-1} + 8x^2 \\ O'(x) = -500x^{-2}+ 16x = \frac{-500}{x^2} + 16x = \frac{-500 +16x^3}{x^2}</tex>
b)
1)
<tex>f(x)= 3ln(2x) \\ f'(x) = 3 \cdot \frac{1}{(2x)}\cdot 2 = \frac {6}{2x} = \frac 3x</tex>
2)
<tex>g(x) = 3x \cdot e^{x^2} \\ g'(x) = 3e^{x^2}+3x \cdot 2x \cdot e^{x^2} = (3+6x^2)e^{x^2}</tex>
c)
1)
<tex>f(x)= x^3-3x^2-13x+15 \\ f(1)= 1-3-13+15 = 0 \\(x^3-3x^2-13x+15):(x-1)= </tex>
d)
e)
f) g) h)