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- bob bundy
- 2012-12-04 05:12:15
OK. That'll do.
Bob
- gbrad88
- 2012-12-04 05:05:17
Maybe if I re-write it.
3^(x+7)=6
- bob bundy
- 2012-12-04 04:45:38
hi gbrad88,
I'd do it like this:
Unfortunately, that's where this question unravels because you'd need to go into complex number theory to sort out log(-1).
This sort of thing happens if you make up a question at random. (And you thought it was easy for a teacher to throw some questions together)
Bob
- gbrad88
- 2012-12-04 04:12:01
That trick makes a lot of sense, but, what about when one number cannot be the same? Like the 6 below:
3^x+7=6
- bobbym
- 2012-12-04 01:26:14
You now have
Here is a trick to these types whenever the bases are the same
you can ignore them and just solve the equation that you get from the exponents.
- gbrad88
- 2012-12-04 01:23:03
I'm not sure. I think I don't understand.
- bobbym
- 2012-12-04 01:18:34
Hi;
You can convert that expression on the right to be
does that help you?
- gbrad88
- 2012-12-04 01:15:20
Sometimes I get x = -1/3 so Im not sure whats the right way to do it. :-(
- bob bundy
- 2012-12-03 23:58:52
hi gbrad88
Welcome to the forum.
That answer looks good to me.
Bob
- gbrad88
- 2012-12-03 23:55:15
I am solving for X below:
4^(3x+5) = 1/256
The answer I get is -3 please correct me if I am wrong and why if you can please. Much appreciated.