calculus check what i have and help?
1 2 3 A 4 B 5
One question at a time is better than five.
Just use wolfram alpha to check it
I don't see choices for question 1..
5 I got a so 1. C 2. ? 3. A 4. B 5. A
Cool, number 1 looks correct c:
will u check 3-5 and then help with 2?
ye, simmer down :O
3 looks good.
4, mmmm I'm not so sure about 4...
for 4 it is either b or d i got b tho.
For problem 2,\[\large\rm y=\arcsin(6x)\]So what is your derivative function?
6/ sqrt1-36x^2
Good, so to get our slope, we evaluate the derivative function at the x-value which was given.
ok so plug in the x value to get it ?
so the 1/6sqrt2?
Yes.\[\large\rm y'\left(\frac{1}{6\sqrt2}\right)=\frac{6}{\sqrt{1-36\left(\frac{1}{6\sqrt2}\right)^2}}\]
i plugged that in and it gave me 6sqrt2 but that isn't a choice :(
Simmer down, that's only half of the problem... step by step...
ok :P did 5 look ok?
Ok so we have the SLOPE of our tangent line.\[\large\rm Y=mx+b\]\[\large\rm Y=\frac{6}{\sqrt2}x+b\]
Plug in the point they gave you (both the original function and the tangent line share this point, so we can use it here) and solve for b, the y-intercept.
Or you could shortcut from this point, and realize that only one of the options has the correct slope.
It's D!
so 4 and 5 look ok too then?
pretty sue is d looking at i t again...
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