Question

http://www.studentbounty.com/pastpapers/Cambridge%20International%20Examinations%20%28CIE%29/International%20AS%20and%20A%20Level/Mathematics%20%289709%29/2014%20Jun/9709_s14_qp_31.pdf
Q10

Answer 1

part ii)

Answer 2

so how can i help you? you need help with these questions?

Answer 3

what grade mathematics are you takeing in your coureses

Answer 4

AHEM , how can i help?? you need help wwith your quiz?

Answer 5

y=(10e^-1/2x)*sin4x
use product rule to find the derivative.
y'=10e^-1/2x*d/dx(-1/2x)*sin4x+10e^-1/2x*4cos4x=-5e^-1/2xsin4x+40e^-1/2xcos4x at stationary point dy/dx=0

Answer 6

so 5e^-1/2xsin4x=40e^-1/2xcos4x
tan4x=8
sovle for x.

Answer 7

@Abmon98 get ready your gonna need a calculator do you have one?

Answer 8

so 5e^-1/2xsin4x=40e^-1/2xcos4x
tan4x=8
sovle for x.
so if you solve for x.. what do you get?

Answer 9

yes, tan^-1(8)=4x
tan(180+x)=tan(x)
so 4x=82.87,180+82.87
x=20.71,65.71

Answer 10

for part ii) is it going to be some sort of an arithmetic sequence.

Answer 11

ok..so is that your answer? did you get it? make sure the equation is right!

Answer 12

yes, my answers for x are correct.

Answer 13

-APPLAUDE- okay there you have it!!

Answer 14

a=20.719 d=65.719-20.719=45 so the general equation for the arithmetic sequence is 20.719+(n-1)45>25

Answer 15

GOOD LUCK ON YOUR QUIZ!! TTYL

Answer 16

thanks :) @prettyprincess1 but should we convert our answer into radians.

Answer 17

u might!! any way your welcome!! if u like pls give me a medal!! i didmy best!! @Abmon98