9) Given that y = 10^x, show that:
a) y^2 = 100
easy.. (10^x)^2 = (10^2)x = 100^x
b) y/10 = 10^x-1
any ideas how to show this one?
14) Given that p = log_q 16 (q as the base), express the following in terms of p.
a) log_q 2 don't know how to do this
b) log_q 8q don't know how to do this either
3) Solve, giving your answers as exact fractions, these simultaneous equations:
8^y = 4^(2x+3)
log_2 y = 4 + log_2 x
equation 1: (2^3)y = (2^2)^(2x+3)
2^3y = 2^(4x+6)
3y = 4x + 6
I've probably already gone wrong here. If I have, what was i supposed to do? and If i haven't, where do I go from here?
THANK YOU! ANY help is appreciated. this is a chapter im struggling on quite a bit
A few basic C2 log questions i cant seem to do.. help would be much appreciated Watch
- Thread Starter
- 21-01-2010 22:15
Last edited by maxfire; 21-01-2010 at 22:54.
- 21-01-2010 22:39