and we get 6, but it says to put it in slope-intercept form and that's where I'm confused
OpenStudy (dan815):
slope intercept form is y=mx+b
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
Yeah but I just didn't know where to plug what at
OpenStudy (anonymous):
x goes where x is and y goes where y is but where does the 6 go
OpenStudy (anonymous):
i know*
OpenStudy (dan815):
f'(x)=3x^2 +1
f'(1)=4
OpenStudy (anonymous):
Oooh okie
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
i wouldn't expect dan to give direct answers like that
OpenStudy (dan815):
that shud have been x-1 not x-2 since our point is 1,2
OpenStudy (dan815):
y-2=4(x-1) arrange in slope intercept form
y=4x-4+2
y=4x-2
OpenStudy (anonymous):
so...? o.o
OpenStudy (dan815):
do you get it?
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
I don't even know the answer this point :I
OpenStudy (dan815):
okay lets start again
first we find the slope
f'(x)=3x^2+1
f'(1)=3+1 =4
now we have a point (1,2) and slope 4
y-2 = 4*(x-1) now rearrange into y=mx+b form
y=4x-4+2
y=4x-2
OpenStudy (anonymous):
Ooooh
OpenStudy (dan815):
can you try the next question on your own?
OpenStudy (anonymous):
I will try
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (dan815):
A horizontal line has slope 0, find y' and set it = 0
OpenStudy (anonymous):
would we derive first? ._.
OpenStudy (dan815):
yeah first you get the equation that tells you the slope everywhere which is the first derivative
OpenStudy (anonymous):
so 1/2+-sinx=0??
OpenStudy (dan815):
yep that is right
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (dan815):
solve for x
OpenStudy (anonymous):
0?
OpenStudy (dan815):
rearrange this equation
OpenStudy (dan815):
1/2 - sinx=0
sinx=1/2
OpenStudy (dan815):
x=inversine(1/2)
Still Need Help?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (dan815):
you can use your calculator or if you remember special trianglegs