Logs

Calculus Level 1

Find x:

$\log _{ 3 }{ 81 } +\log _{ 2 }{ 32=\log _{ x }{ 512 } }$

2 solutions

Rocky El-Azar
Apr 25, 2014

$log_3(81) = 4$

$log_2(32) = 5$

$log_3(81) + log_2(32) = 9$

$log_x(512) = 9$

$x^9=512$

$x=2$

no calculus involved

Ifunanya Nwogbaga - 6 years, 10 months ago

Muhammad Tir
Oct 10, 2014

I did this all without a calculator