ACT® · Math: Functions — Exponential and Logarithmic Functions
A Logarithm Is an Exponent (F 707)
Watch it explained
- How it worksHow does a logarithm simply read the exponent off an exponential curve?
- How it worksWalk me through why the logarithm of a number below 1 comes out negative.
- Worked exampleFind log base 3 of 81 and log base 5 of one twenty-fifth.
- Going furtherWhat happens to log base b of x when the base b is larger than the number x?
Check yourself
Your turneasy1 of 3
Find the value of log base 7 of 75.End of topic.