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Re: O-Level Additional Math
Posted: Sun Apr 03, 2016 6:34 pm
by Eddow
Angel88 wrote:anyone can help to solve this question? Thank you!
Give you a guide to start.
Move one item to the right.
Take lg both side.
Use power law to bring the power down.
Expand and you will be able to group the lg x together and solve.
Try it
Re: O-Level Additional Math
Posted: Sun Apr 03, 2016 6:44 pm
by Eddow
KSP2013777 wrote:Can somebody pls help me with this question?
Thank you.
HI,
Firstly you have to read carefully. Qn is not asking for stationary point of CURVE !
It is asking for the stationary value for the GRADIENT FUNCTION.
Solution :
So you need to differentiate the GRADIENT, then equate it to zero for stationary value
Try it, should be ok now
Re: O-Level Additional Math
Posted: Mon Apr 04, 2016 10:07 pm
by KSP2013777
Yes, thank you, Eddow. Got the answer now.
Can you help me with another one.
My ans is e^(3/2), but ans key is 1/e^(1/2). Pls help. Tks
Re: O-Level Additional Math
Posted: Tue Apr 05, 2016 4:05 am
by kennethTutor
KSP2013777 wrote:Yes, thank you, Eddow. Got the answer now.
Can you help me with another one.
My ans is e^(3/2), but ans key is 1/e^(1/2). Pls help. Tks
Hello. I think you might have made a mistake in the differentiation.
Anyways I suggest you try to simplify the expression (ln part) before differentiating. It will make the differentiation less tedious.
Solution:
http://imgur.com/7viZpYS
Re: O-Level Additional Math
Posted: Tue Apr 05, 2016 7:53 pm
by happyheart
Hi, can anyone help to explain these 2 questions?Thank you. Sorry the upload pic is not up to standard.
Re: O-Level Additional Math
Posted: Wed Apr 06, 2016 10:42 pm
by Eddow
Re: O-Level Additional Math
Posted: Sat Apr 16, 2016 8:22 pm
by questionable_i
Can anyone please help me with these questions,
1. 9^y+5(3^y-10)=0
2. 3^2x=16-2(3^x+1)
3. 2^2x=2^x+1+15
Thank you
Re: O-Level Additional Math
Posted: Sat Apr 16, 2016 11:56 pm
by Eddow
questionable_i wrote:Can anyone please help me with these questions,
1. 9^y+5(3^y-10)=0
2. 3^2x=16-2(3^x+1)
3. 2^2x=2^x+1+15
Thank you
A rough guide... Use suitable substitution for all the Qn.
1. Let u = 3^y
2. Let u = 3^x
3. Let u = 2^x
Then you can carry on solving using quadratic equation.
Try
Re: O-Level Additional Math
Posted: Tue Apr 19, 2016 7:40 pm
by questionable_i
Eddow wrote:questionable_i wrote:Can anyone please help me with these questions,
1. 9^y+5(3^y-10)=0
2. 3^2x=16-2(3^x+1)
3. 2^2x=2^x+1+15
Thank you
A rough guide... Use suitable substitution for all the Qn.
1. Let u = 3^y
2. Let u = 3^x
3. Let u = 2^x
Then you can carry on solving using quadratic equation.
Try
Thank you so much.
Re: O-Level Additional Math
Posted: Wed Apr 20, 2016 10:04 am
by Boys2Men
Hi there,
I need a private tutor, preferably a male with good experience and credentials to coach my son for A Math ( IP ) who is currently in Year 4.
Kindly pm me.
Thanks.
