## iluvvyyhu Group Title Can someone explain to me how i would solve this problem thanks <3 "Estimate graphically the local maximum and local minimum of f(x)=((1/4)x^5)+(x^2)-4x"? one year ago one year ago

1. iluvvyyhu Group Title

o-o i have a graphing calculator since the review worksheet said i needed one x.x but im not sure how to use it so ya... fail x.x

2. JamesWolf Group Title

the local maximum is when the rate of change between x and y is 0|dw:1358379289305:dw|

3. JamesWolf Group Title

the rate of change between x and y is found by taking the derivative

4. JamesWolf Group Title

then you can find where the maximum and minimum are by solving $\frac{ dy }{ dx } = 0$

5. iluvvyyhu Group Title

im sorry but im still confused x.x what would i plug into that formula? ^-^;

6. JamesWolf Group Title

Do you know how to find the derivative of the formula in the question?

7. iluvvyyhu Group Title

no :(

8. JamesWolf Group Title

is this homework? what topic are you doing at the moment?

9. iluvvyyhu Group Title

its a segment review for my exam x.x and its pre-calc

10. iluvvyyhu Group Title

i switched schools so some of the stuff i dont know x.x

11. JamesWolf Group Title

yeah your going to need to put the function into your graph and just see where the maximum and minimum are, and guess

12. JamesWolf Group Title

have a look on google for an instruction book for your calc

13. iluvvyyhu Group Title

okay:/ thanks though <3

14. JamesWolf Group Title

if you cant use your calculator go here http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html

15. JamesWolf Group Title

copy this formula ((x^5)/4) + (x^2) - 4x its your one but arranged in a way this calc likes it

16. JamesWolf Group Title

and paste it after y1 = then press graph

17. iluvvyyhu Group Title

thanks!(:

18. JamesWolf Group Title

:)