Grade 11 · Math
Read a logarithm as an exponent
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Example & extra help
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Find log base 5 of 125.
- 3
- 2
- 4
- 5
See the answer & why
3
A logarithm gives an exponent: 53 = 125, so log base 5 of 125 is 3.
A little hint: Ask: to what exponent must the base be raised to get the positive argument?
Check that the base is positive and not 1, and that the argument is positive.
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