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You are not logged in. #1 20120926 03:17:42
Can somebody please help me understand......how we find the interval where the function e^xe^(3x) is increasing... the derivative is e^x[1  3e^(2x)]. I have the answer but I feel lost.. #3 20120926 03:37:52
Re: Can somebody please help me understand...Hi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #4 20120926 03:44:22
Re: Can somebody please help me understand...OK, here we go. e^x is always positive so you need log base e is an increasing function so the inequality holds if you take logs Graph below. Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #5 20120926 03:45:12
Re: Can somebody please help me understand...
Hi bobbym! I took a look at the graph in wolframalpha or smth..but it won't help on my future exams.. if i do not know how to find the answer on my own. #7 20120926 03:54:30
Re: Can somebody please help me understand...Hi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #8 20120926 03:56:59
Re: Can somebody please help me understand...
Your approach seems wonderful!!! and according to me correct.. but why does the book i have give another..but very similar answer?.. it says x<or=1/2*ln3 Is it the same but i'm missing smth?? Last edited by n1corponic (20120926 03:59:02) #9 20120926 04:03:33
Re: Can somebody please help me understand...hi n1corponic But the book shouldn't be saying less than and equal to because the graph has a turning point when = so dy/dx = 0 So the value of the function isn't getting bigger. Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #10 20120926 04:13:35
Re: Can somebody please help me understand...
wow! they are the same indeed! I feel sooooo much better now! #11 20120926 04:25:55
Re: Can somebody please help me understand...The square bracket means include the endpoint. It seems I am assuming too much. If it doesn't say strictly, I concede the argument. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #12 20120926 04:33:06
Re: Can somebody please help me understand...
Thank you for everything!!!!!!! bob bundy!!!!!! plus congrats to owner..admins..moderators etc. for this great site! cheers! 