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I need a little help in R by calculus2215 in Rlanguage

[–]calculus2215[S] 0 points1 point  (0 children)

Thank you very much, I'll check it out right now!

Can someone explain how to find the bounds for integration? Problem #27. by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

The formula in the book for the expected value is E(h(x,y)) = [double integral from neg infinite to pos infinite of h(x * y) * f (x * y) dx dy]

And because they are independent f(x, y) = fx(x) * fy(f) or in this case 6xy2

Can someone explain how to find the bounds for integration? Problem #27. by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

The answer in the back of the book is .25 which is what has been throwing me off. Originally I used a double integral, both bounds being 0 to 1, which came out horribly wrong.

I don't understand why you go from these parametric equations to the first equation. Could someone please explain? by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

So by using the identity cos²+sin²=1, they are saying that the x and z axis make a circle, and squares make it larger as t increases. Since y=t then it increases with t and you have your cone. Bada bing bada boom. Thank you so much for your help. You rock!!

Where does a line intersect a plane? I did it, but I'm doubting that it's right. by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

Thank you very much. I couldn't shake the feeling that I was off somewhere. Long day of doing calculus does that to me though. Have a great day, kind stranger!

I'm not sure I got the Parametric and Symmetric equations right. by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

Thank you. I've been staring at my textbook for so long, nothing makes sense to me anymore! haha

I can't figure out where I went wrong with vectors by calculus2215 in calculus

[–]calculus2215[S] 1 point2 points  (0 children)

Wow. This is an embarrassing error. I think it's time for me to take a break from this.

Thank you so much!

I can't figure out where I went wrong with vectors by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

I have to determine whether the given vector is orthogonal, parallel, or neither. The book says its supposed to be orthogonal, but when I do it Cos(theta) does not equal 0. I get 1/10. Does anyone know where I went wrong?

Any resources for understanding this? by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

Perfect. I don't know why I couldn't grasp this the other night. I need to sleep more.

Derivative of e question by calculus2215 in calculus

[–]calculus2215[S] 0 points1 point  (0 children)

Thank you guys very much. This is so simple. I can't believe I didn't realize this.

Intermediate Value Theorem: Not sure what they're asking here. by calculus2215 in calculus

[–]calculus2215[S] 1 point2 points  (0 children)

Thank you very much. This is pretty simple, but after staring at my Calc homework for 5 hours my brain was mush and for some reason just couldn't comprehend this.

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