## Needamedal Group Title I GIVE MEDALS Find the fifth roots of 243(cos 300° + i sin 300°). one year ago one year ago

1. Needamedal Group Title

@amistre64 :) can you help with another couple ?

2. AravindG Group Title

nice name :)

3. Needamedal Group Title

@AravindG thanks ... can you help ?

4. josie_2015 Group Title

450^2

5. Needamedal Group Title

@josie_2015 can you give the work with it ?

6. amistre64 Group Title

the 5th roots are essentially adding 2pi/5 to what you have

7. amistre64 Group Title

243(cos ((5/3+2n/5) pi) + i sin((5/3+2n/5)pi ) ) n = 0 to 4

8. Needamedal Group Title

so thats the final answer ?

9. amistre64 Group Title

im not sure what a "final answer" should be formated as; but yes ....

10. amistre64 Group Title

5th roots are just |dw:1367951499404:dw|

11. amistre64 Group Title

so start where you are at; 5pi/3 and add on each root

12. amistre64 Group Title

72 degrees might be easier to read tho

13. amistre64 Group Title

$\frac{x}{x-5}$ $\frac{x+0}{x-5}$ $\frac{x+(5-5)}{x-5}$ $\frac{x-5}{x-5}+\frac{5}{x-5}$ $1+\frac{5}{x-5}$

14. Needamedal Group Title

would my response be correct ?

15. Needamedal Group Title

confused lol

16. amistre64 Group Title

this is approaching -inf, yes

17. Needamedal Group Title

thank you so much one more?

18. amistre64 Group Title

we could say that the slope of 1+5/(x-5) = -5/(x-5)^2 is always negative as x approaches 5 from the left ... but sure, one more

19. amistre64 Group Title

well, since the picture shows the distance along the y axis to be bigger than the x axis .. we want the under ys to be bigger than the under xs by default. that narrow it to 2 options

20. amistre64 Group Title

and since the center of the moon is 1000 further than its surface, that should make the correct choice rather obvious

21. Needamedal Group Title

option D?

22. Needamedal Group Title

@amistre64

23. amistre64 Group Title

option D is not correct, since the under y is smaller than the under x

24. Needamedal Group Title

so then my last educated guess is C @amistre64

25. amistre64 Group Title

i would deduce that you need better education then :) C still has the under y smaller than the under x, AND it is missing the 1000 extra stuff for the radius ...

26. amistre64 Group Title

assume for a moment we have this setup:|dw:1367953733151:dw| in order for this to make any sense:$\frac{x^2}{n^2}+\frac{y^2}{m^2}=1$when x=0, we have y=2$\frac{0^2}{n^2}+\frac{2^2}{m^2}=1~:~m=2$ when y=0, we have x=1$\frac{1^2}{n^2}+\frac{0^2}{2^2}=1~:~n=1$ therefore our setup has to be:$\frac{x^2}{1^2}+\frac{y^2}{2^2}=1$ the part under the y has to be greater than the part under the x

27. amistre64 Group Title

in your case: 953 is bigger than 466, but thats not accounting for the extra 1000 radius, sooo.... y x 1953 is bigger than 1466

28. Needamedal Group Title

WOW THANKS SO MUCH I SEE NOW !

29. amistre64 Group Title

good luck ... ;)