## lilg132 3 years ago diffrentiate

1. lilg132

differentiate $y = 3x ^{3} - 4x ^{2} + 8x - 6$

2. satellite73

repeated use of power rule $\frac{d}{dx}[x^n]=nx^{n-1}$

3. lilg132

i got $y = 6x ^{2} - 8x + 2$

4. lilg132

OR IS IT + 8 ?

5. lilg132

no im joking lana :\

6. lalaly

dy/dx=9x^2-8x+8

7. lilg132

how?

8. lalaly

apply the rule satellite posted

9. lilg132

oooops i messed up lol one sec

10. lilg132

9x^2 - 8x + 8

11. lalaly

oki:D

12. lilg132

thanks but one thing im confused about

13. lalaly

Just a note, when u differentiate write dy/dx or y' = ...

14. lilg132

in the end its 8x - 6 at the end of the equation we get something like 9x^2 - 8x + 8 - 6

15. lilg132

so why do we leave the -6 out completely?

16. lalaly

because 6 is a constant and the derivative of a constant is always 0

17. lilg132

so do i write + c in the end or anything?

18. lalaly

no that is only when integrating

19. lalaly

for indefinite integrals only

20. lilg132

ok thanks alot lana

21. lalaly

im sorry about the first post ...

22. lilg132

lol dont worry

23. samjordon

hey lilg remember me?

24. lalaly

@Pippa lol

25. lilg132

hey pippa :D