Sunday

December 21, 2014

December 21, 2014

Posted by **bobby** on Wednesday, March 28, 2012 at 9:16pm.

f(x) = (7^(x))* (log base 3 of(x))

f '(x) =

- math -
**Steve**, Thursday, March 29, 2012 at 11:23amyou just need to memorize a couple more formulas:

you know that if

f = e^x

f' = e^x

f = a^x

f' = a^x ln(a)

log_{b}x = ln(x)/ln(b)

f = log_{b}x

f' = 1/ln(b) * 1/x

so, for f above,

f' = 7^x ln7 log_{3}x + 7^x * 1/xln3

= 7^x ln7 lnx/ln3 + 7^x *1/xln3

= 7^x/xln3 (x ln7 lnx + 1)

**Answer this Question**

**Related Questions**

Algebra 2 - -Explain the difference between log base b (mn) and ( log base b of ...

Advanced Functions/ Precalculus Log - 1. Evaluate 4^(log base4 64) + 10^(log100...

math - i have 2 math questions i dont understand so if you could help me i would...

math - Use the Laws of logarithms to rewrite the expression log(base 2)(11x(x-9...

Precalc - 1. 1/3log base 8 of (x+1)=2log base 8 of 3-(2/3)log base 8 of (x+1) 2...

math - mathematically Evaluate without using tables 2 log base 10 raised 2 power...

Math - Help with these problems would be greatly appreciated: 1.Find the ...

Trig - log base b 64 - log base b 16 = log base 4 16 solve for the variable.. i...

check! - here is the question: log5(x-4)= log7x solve for x. These are just base...

Math - Bases - What is 12 base 5? Would you just divide 12 by five and get 2 (...