Recent content by Ris Valdez

Sorry! Problem: find f ' (x) if f(x) = (4x + 4) / (x^2 + 4) My answer (which was marked wrong by wiley): (-4x^2 + 16 - 8x) / [(x^2 + 4) ^2] Is that good enough?

Sorry! I was just making sure.

Homework Statement Find f ' (x) if f(x) = 4x + 4 / x2 + 4 Homework Equations I used the mnemonic "lo dhi - hidlo / (lo)^2 The Attempt at a Solution I got -4x^2 +16-8x / (x^2+4)^2 but it's telling me I'm wrong? Why? I computed it again but I still got the same answer.

Thanks! It was a wiley assignment and I thought I did it wrong xD

Homework Statement Given that lim f(x) = -4 and lim g(x) = 6 (All limits x --> +infinity) Find the limit lim [f(x) + 2g(x)]Homework Equations The Attempt at a Solution So I substituted the values of f(x) and g(x) in the equation...

Hahaha that's what she used in that number though. Can you tell me what's wrong with the formula and how to really use the right one? I'm really sorry for asking much but I'm quite stuck...

So my professor was wrong? :0

Using the formuka for B Irms = Vrms / 2pi fL = 170V / 2pi (274.57Hz) (28×10^-3H)

Homework Statement A 10 ohms resistor, a 12 microFarad capacitor and a 28 mH inductor are connected in series with a 170 V generator. A.) At what frequency is the rms current maximum? B.) What is the maximum value of the rms current? Homework Equations A.) Fo = 1 / 2pi sqrtLC b.) Irms = Vrms...