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 Post subject: Algebra IV pag85 #62Posted: Thu Nov 04, 2010 5:26 am

Joined: Thu Sep 16, 2010 12:36 pm
Posts: 2
How can I imply that 1/2^x<0.01 is 2^x>100? Why the sign "<" was replaced by ">"?
Thanks!

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 Post subject: Re: Algebra IV pag85 #62Posted: Mon Nov 08, 2010 10:31 am

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
1 / 2^x < 0.01
First, turn .01 into 1/100
1 / 2^x < 1/100
Then, multiply both sides by 2^x
1 < 2^x / 100
Then multiply both sides by 100
100 < 2^x
(now, if you need to, you can flip it around to say 2^x > 100, but we haven't changed anything in this process.)

Veritas Help

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