(adsbygoogle = window.adsbygoogle || []).push({}); Can some one check my answers please?

The answers are in my reply post at the bottom of this page THANKS

I have a couple more log questions Im stuck on. They keep giving me log questions that they never showed me how to do.. very fustrating!

I need to evaluate the following logarithms:

68 a). log22^log55

I dont even know where to begin.. I never done a log with an exponent log???

69. log25=log2(x+32)-log2x

Determine the derivative of:

70 c) y= 2x^3 e^4x

e) y= square root(x^3 + e^-x +5)

I know this one should probably go to. (x^3 + e^-x +5)^1/2... then,

dy/dx= (x^3 + e^-x +5)^1/2 * 1/2(x^3 + e^-x +5)^-1/2 * (3x^2)now im confused??? does the e^-x have a derivative?? like -xe^-2?? i got no idea.

CAN ANYONE HELP ME PLEASE....

THANKZ YA!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# More log questions.

**Physics Forums | Science Articles, Homework Help, Discussion**