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if f(x)=x^39x^2+15x+3
What is the relative maxima ?
 one year ago
 one year ago
Checking my answers if f(x)=x^39x^2+15x+3 What is the relative maxima ?
 one year ago
 one year ago

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waterineyesBest ResponseYou've already chosen the best response.1
It will be right as it is calculated by the Great @hba ha ha ha..
 one year ago

hbaBest ResponseYou've already chosen the best response.0
I have more question to get checked can i ask here or in a new post.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
I don't know how to solve these types of questions.. Can you teach me how to solve it..??
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Ha Ha Ha Nice joke,first let me ask my questions.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
First, we will take derivative.. Right??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
So wait, I am doing it..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
f'(x) = 3x^2  18x + 15
 one year ago

sirm3dBest ResponseYou've already chosen the best response.0
there are two extrema, 1 relative maximum and 1 relative minimum.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Should I factorize it??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Yes I mean the same..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
\[x^2  6x + 5 = 0 \implies (x  5)(x  1) = 0\]
 one year ago

hbaBest ResponseYou've already chosen the best response.0
Now put 1 in the orignal equation.
 one year ago

hbaBest ResponseYou've already chosen the best response.0
Because we are finding the relative maxima
 one year ago

sirm3dBest ResponseYou've already chosen the best response.0
oooh, i misread the problem. relative maxima.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
So, we have to put smaller value??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Just checking your answer.. Ha ha ha..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Now don't say, to find relative minima, we will put 5..
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Check these two questions.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
How to solve these now??
 one year ago

hbaBest ResponseYou've already chosen the best response.0
I got f'(x)=e in both the cases.
 one year ago

hbaBest ResponseYou've already chosen the best response.0
And f''(x)=1/e for 1st and f''(x)=e in the 2nd one.
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Are you sure it is e ??
 one year ago

hbaBest ResponseYou've already chosen the best response.0
Pretty sure Because i did this one like 100 times when i was in High school
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
You have used division rule here??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
For first : \[f'(x) = \frac{1  \ln(x)}{x^2}\]
 one year ago

hbaBest ResponseYou've already chosen the best response.0
The most intelligent @waterineyes
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Not intelligent as you @hba
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Now, find the second derivative..
 one year ago

hbaBest ResponseYou've already chosen the best response.0
I am getting something,which looks extremly wrong :/
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Here you go \[f''(x)=x2x+2lnx/x^4\] I kow it's wrong :/
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Sorry busy helping other person..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Now I think, if it was e then it will be simpler..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Wait, let me check..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
You can add first two terms in the numerator..
 one year ago

hbaBest ResponseYou've already chosen the best response.0
Yeah i can add them so, \[f''(x)=3x+2lnx/x^2\]
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Ansoo kahan ho tum ?
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Answer tau sahi hai mera,Is ki working mushkil hai :/
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Now what to do next??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
I had a guest in home so busy there.. Sorry, let us now work together..
 one year ago

hbaBest ResponseYou've already chosen the best response.0
@waterineyes Where should i continue ?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
What we will do next after finding second derivative?? To find extreme value..
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
Where are we going?? Is that right??
 one year ago

hbaBest ResponseYou've already chosen the best response.0
i think we should skip these lol,I am pretty sure about my answers :) Do you know what is a stationary point ?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
The point which is stationary is called Stationary Point, that's it..!!!
 one year ago

hbaBest ResponseYou've already chosen the best response.0
So, if f(x)=ln(1+x^2) What will be the stationary point ?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.1
I think I should go now.. Ha ha ha.. Seriously, don't know..
 one year ago
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