Use the change of base formula to evaluate `log_7 13`, correct to two decimal places. (1 mark)
Logarithms, SMB-006 MC
The expression
`log_c(a) + log_a(b) + log_b(c)`
is equal to
- `1/(log_c(a)) + 1/(log_a(b)) + 1/(log_b(c))`
- `1/(log_a(c)) + 1/(log_b(a)) + 1/(log_c(b))`
- `-1/(log_a(b))-1/(log_b(c))-1/(log_c(a))`
- `1/(log_a(a)) + 1/(log_b(b)) + 1/(log_c(c))`
L&E, 2ADV E1 2005 HSC 5a
Use the change of base formula to evaluate `log_3 7`, correct to two decimal places. (1 mark)
L&E, 2ADV E1 2013 HSC 9 MC
What is the solution of `5^x=4`?
- `x=(log_2 4)/5`
- `x=4/(log_2 5)`
- `x=(log_2 4)/(log_2 5)`
- `x=log_2(4/5)`