Recent content by hotrocks007

this is just a general question, one that keeps coming up everytime i take a test or quiz. I understand that the derivative of a constant is zero, but I don't understand when you use that zero to multiply or divide in a problem, and when you just ignore that zero. For example x^2/3...

I am graphing a parabola for a calculus problem. I understand how you factor and use the two x values as your x-intercepts, but I'm not sure how this one would be graphed. y=4x^2 - 25. I understand how the vertex of the parabola would be at negative 25, but I have no clue what to do woith...

Determine the value of c so that f(x) is continuous on the entire real line if f(x)={ x^2, x<_3 (less than or equal to) { c/x, x>3 I've been trying by just guess and check, but I have absolutely NO idea! Please help!

I have a summer calc assignment due tomorrow, and I've been stuck on these two problems. Help is appreciated! Solve for y: x^2 + y^2 + 4x - 6y +12=0 I tried this: x^2 + 4x + 12 = -y(y-6) But I don't think that was correct. THe left side wont' factor, and I don't htink that is the right...

when you distribute the 3, would it be 3rcos3theta? or do you just not distribute the 3 to the cos?

OH! thanks!

the Pythag. Identity? Would you have to plug in rcostheta with the 3x?

oh yes thanks! how about this one. I'm not sure how to simplify it down, and how to distribute the ^2 once it has been plugged in. x^2 + y^2 +3x=0 when x=rcostheta and y=rsintheta

ohh, costheta=sqrt(6)/3 ?

I'm taking Calculus next year and over the summer I have some assignments. This one is due in a couple of hours, so any help would be appreciated! If cos2t=1/3 and *0<_ 2t <_ pie, find cost. t=theta *less than or equal to I don't know how to use the identities to help me...