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July 18, 2025, 12:16:30 pm

Author Topic: onur369's Methods Question Thread :)  (Read 30895 times)  Share 

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xZero

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Re: onur369's Methods Question Thread :)
« Reply #105 on: April 05, 2011, 06:00:52 pm »
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so we have and

the gradient of PQ is

sub the points in and you'll get E
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onur369

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Re: onur369's Methods Question Thread :)
« Reply #106 on: April 05, 2011, 06:19:45 pm »
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If possible can you explain with a little more detail please?
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xZero

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Re: onur369's Methods Question Thread :)
« Reply #107 on: April 05, 2011, 06:30:35 pm »
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From the question we know that we have two points, P and Q and their co-ordinates are and

The first step is to find and , since we have the function we can sub in our x coordinates in to find y respectively and we will get and which becomes

The gradient of the chord PQ is just asking you to find the change in y in respect of x from P to Q

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onur369

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Re: onur369's Methods Question Thread :)
« Reply #108 on: April 05, 2011, 07:44:10 pm »
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Guys im stuck on one more question, pretty simple one too :(

find derivative of:
4ln(sqroot 2-x^2)
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xZero

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Re: onur369's Methods Question Thread :)
« Reply #109 on: April 05, 2011, 08:01:28 pm »
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use the chain rule, let







,

Edit: blah my bad
« Last Edit: April 05, 2011, 08:13:20 pm by xZero »
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m@tty

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Re: onur369's Methods Question Thread :)
« Reply #110 on: April 05, 2011, 08:08:40 pm »
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^minor correction, but the domain should be

because the original function is not defined when |x| is root 2, as it results in ln(0).
« Last Edit: April 05, 2011, 08:10:50 pm by m@tty »
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Re: onur369's Methods Question Thread :)
« Reply #111 on: April 05, 2011, 09:00:46 pm »
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I cant solve this.

Find the derivative of  that.. how do i used the product rule.. because i seem yo keep gettin the  wrong answer which is//

3/(x-2)^2

but the right answer is E.. can someone solve it?

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xZero

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Re: onur369's Methods Question Thread :)
« Reply #112 on: April 05, 2011, 09:05:00 pm »
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use the quotient rule instead :P
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Re: onur369's Methods Question Thread :)
« Reply #113 on: April 05, 2011, 09:07:18 pm »
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use the quotient rule instead :P

sorry i meant i was using the quotient rule...  but i still seem to get it wrong.. idk what program ur using to write that math equations but what i do is, 1 sec. ill show u

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Re: onur369's Methods Question Thread :)
« Reply #114 on: April 05, 2011, 09:08:00 pm »
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or quotient rule



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Re: onur369's Methods Question Thread :)
« Reply #115 on: April 05, 2011, 09:16:06 pm »
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or quotient rule





ohh!! lol.. i was writing the forumla wrong.. instead i was writing

u`v - v`u
________
     v^2

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m@tty

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Re: onur369's Methods Question Thread :)
« Reply #116 on: April 05, 2011, 09:20:17 pm »
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use the quotient rule instead :P

Or product rule:

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onur369

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Re: onur369's Methods Question Thread :)
« Reply #117 on: April 05, 2011, 09:37:27 pm »
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I know how to do the question but again im just asking just to make sure, there a multiple ways of differentiating.

Which method should I use for the question below
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Re: onur369's Methods Question Thread :)
« Reply #118 on: April 05, 2011, 09:40:14 pm »
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I would go



As required.
« Last Edit: April 05, 2011, 09:42:32 pm by m@tty »
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onur369

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Re: onur369's Methods Question Thread :)
« Reply #119 on: April 05, 2011, 09:41:12 pm »
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We have done it the same way :)
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