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redlotus
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Posted on 03-20-10 1:10
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find the derivative of: f(x)=ln(x+5)^(1/2)
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wtf
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Posted on 03-20-10 1:24
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1/2(x+5) shud be the answer... (however, please confirm yourself) dlnx/dx = 1/x, so use chain rule as shown below, dln(sqrt(x+5)) d(sqrt(x+5)) __________ * ___________ d(sqrt(x+5)) dx
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wtf
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Posted on 03-20-10 1:25
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in fact, i shuda been clearer.... 1/ (2(x+5)) <--- answer
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Namaskaar
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Posted on 03-20-10 1:38
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I think it should be (just thinking, but I would have this answer if I were asked) 1/2(x+5) -1/2I haven't taken much of calculus and my familiarity with it is from my 11th grade where I passed maths by securing 36 in final exam :) So, don't rely on it completely, though i believe in my solution to my knowledge, better check it by urself.
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sports freak
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Posted on 03-20-10 5:53
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i think WTF is correct.. i got the same answer..
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Namaskaar
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Posted on 03-20-10 6:17
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Hey redlotus, when u find out correct solution, will you report it here. because as far as I know d ln(x+5) 1/2 / dx = 1/2 (x+5) 1-1/2= .5(x+5) -1/2
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sports freak
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Posted on 03-20-10 6:30
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hey namaskar , u better take some derivative classes!! i think u know nothing abt calculus and esp derivative....
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Namaskaar
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Posted on 03-20-10 6:41
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Sports freak, I'm happy that I don't need to. Days of school overrrrrrrrrr for now. Thanx for pointing out anyway. Ya I find something wrong with my solution If the derivative was with respect to (x+5) i think my earlier solution would be right. d ln(x+5) 1/2 / d (x+5) = .5 (x+5) - .5but with respect to x only nooooooo. Sorry for giving wrong solution. My baddddddddd :)
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Namaskaar
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Posted on 03-20-10 6:47
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let me guess another soln how about 2(sqrt X) Pls someone post a real soln. I am getting curious :) and it is boring that all other threads today in Sajha are related to dead person.
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raju161
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Posted on 03-20-10 7:11
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raju161
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Posted on 03-20-10 7:13
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Last edited: 20-Mar-10 07:19 PM
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Namaskaar
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Posted on 03-20-10 9:52
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Thanx raju for making it clear. Glad don't have to go thru this again :)
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