Question

How do you calculate x if: 0,97^x = 0,3

Answer 1

Only logarithms...
\[\huge a^x = b \rightarrow x = \log_a b\]

Answer 2

hmm, how do I type that on a calculator?

Answer 3

u have to use a scientific calculator..... or u may use a log table also...

Answer 4

how? I can type log b, for instance, but how to I express the base a? I've got a ti-86

Answer 5

Well, you have ln in that calculator?

Answer 6

Or a log. It doesn't even matter, actually :D
\[\huge \log_ab = \frac{\ln b}{\ln a}=\frac{\log b}{\log a}\]