Homework Help: precalc/trig

Posted by Alexander on Monday, December 5, 2011 at 2:01pm.

Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places.

20 log(2x+2)=45

precalc/trig - Steve, Monday, December 5, 2011 at 3:04pm
log(2x+2) = 45/20 = 2.25
assuming natural logs,

2x+2 = e^2.25
x = (e^2.25 - 2)/2

x = 3.7439

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