# Need LOGARITHM Help.

• Nov 24th 2013, 03:30 AM
meltinghero
Need LOGARITHM Help.
Hello I have been trying this questions forever to no avail. Could anyone help me?

A. Using the laws of logarithms, simplify x^-0.45 = 0.521 and evaluate for x [5 marks]

B. Find the fifth root of 600 using logarithms. [4 marks]
• Nov 24th 2013, 04:41 AM
topsquark
Re: Need LOGARITHM Help.
Quote:

Originally Posted by meltinghero
Hello I have been trying this questions forever to no avail. Could anyone help me?

A. Using the laws of logarithms, simplify x^-0.45 = 0.521 and evaluate for x [5 marks]

B. Find the fifth root of 600 using logarithms. [4 marks]

A) Hint: $ln(x^{-0.45}) = -0.45~ln(x)$

B) This looks a bit ridiculous as you need a calculator either way, but start with $ln(600^{1/5})$.

-Dan