Exponential inequalities
10-09-2015, 10:54 AM
Post: #1
 Aries Member Posts: 159 Joined: Oct 2014
Exponential inequalities
Hi there, it's Aries here ;-)
I was checking some exponential function inequalities: solve(3root(2^(4*x-1))>=(2^(x-5))/(4root(16^x))), the calculator reboots.
Typing solve(2^((4*x-1)/3)>=(2^(x-5))/(16^(x/4))), all is ok, the calculator returns the correct answer (x>=(-7/2)).
Another example: solve(2^(3*x-1)+2^(6*x-2)-2^(3*x+3)<(4^(3*x-2))), the calculator gives the advise "Warning, solving parametric inequation requires assumption on parameters otherwise solutions may be missed. The solutions are UNABLE TO ISOLATE x IN.....
Why happens this ?
Is it due to some sort of complexity or what ?
Is there a "workaround" to solve this kind of inequations ?
Thanks all for the explanations,

Aries ;-)
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 Messages In This Thread Exponential inequalities - Aries - 10-09-2015 10:54 AM RE: Exponential inequalities - roadrunner - 10-10-2015, 10:35 AM RE: Exponential inequalities - parisse - 10-10-2015, 11:58 AM RE: Exponential inequalities - Aries - 10-11-2015, 10:20 AM RE: Exponential inequalities - Aries - 10-17-2015, 09:06 AM RE: Exponential inequalities - Tim Wessman - 10-10-2015, 01:54 PM RE: Exponential inequalities - Aries - 10-11-2015, 06:39 AM RE: Exponential inequalities - roadrunner - 10-10-2015, 11:03 PM RE: Exponential inequalities - Aries - 10-11-2015, 10:23 AM RE: Exponential inequalities - parisse - 10-17-2015, 04:15 PM RE: Exponential inequalities - Aries - 10-25-2015, 10:53 AM

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