Tuesday, February 10, 2015

Solve for x equation 1+log3 x =2 .

The solution of the equation has to respect the constraint
of existence of logarithm:


x >
0


We'll write the value 1 = log3
3


We'll use the produt rule of
logarithms:


log3 3 + log3 x = log3
(3x)


We'll solve the equation, taking
anti-log:


log3 (3x) = 2


3x =
3^2


3x = 9


We'll divide by
3:


x = 3


Since
the value of x is positive, we'll accept it as solution of the equation, so x =
3.

No comments:

Post a Comment

What accomplishments did Bill Clinton have as president?

Of course, Bill Clinton's presidency will be most clearly remembered for the fact that he was only the second president ever...