Evaluate Logarithms

Front

To evaluate a logarithm statement log_9 81, you think "9 to what power is 81".

Back

True, and it's 2.

Front

log_2 128 = ?

Back

7

Front

log_5 25 = ?

Back

2

Front

Evaluate b^log_b(x)

Back

x

Front

Solve for x: log_x 243 = 5

Back

3

Front

Definition of a logarithm: log_b(a) = c means?

Back

b^c = a.

Front

What is the change of base formula for logarithms?

Back

log_b(a) = log_k(a) / log_k(b) for any base k.

Front

What is the value of log_10(1000)?

Back

3, because 10^3 = 1000.

Front

If log_b(x) = y, what is x in terms of b and y?

Back

x = b^y.

Front

What is the logarithm of 1 in any base?

Back

0, because b^0 = 1.