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Mathematics 22 Online
OpenStudy (anonymous):

log base 2 (x)>=1

OpenStudy (anonymous):

still pondering on this one ?

OpenStudy (rulnick):

x>=2

OpenStudy (anonymous):

yep rulnick

OpenStudy (anonymous):

i have a test tomorrow and all of these are essentially the same. I still don't understand how i take a log (base of something small, 2,3,7 or whatever) to x with some sort of inequality to 1 or 0

OpenStudy (rulnick):

if the inequality has left-hand side M and right-hand side N, solve it by replacing the left with b^M and right by b^N, where b is the base of the log.

OpenStudy (rulnick):

And remember, b^(log_b x) = x.

OpenStudy (rulnick):

Good luck on the test.

OpenStudy (anonymous):

can you explain the "if the inequality has..." part a bit more?

OpenStudy (anonymous):

or even how you sold my original question

OpenStudy (rulnick):

Orig question: log_2 x >= 1 Doing the steps I suggest: 2^(log_2 x) >= 2^1 x >= 2 That's it!

OpenStudy (anonymous):

ohhhh, I've been at this for 2 hours... thanks for the new suggestions

OpenStudy (anonymous):

*suggestion

OpenStudy (anonymous):

one more if you're up to it?

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