Please Help Me To Solve This Question - Education

Please Help Me To Solve This Question - Education - Nairaland

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Please Help Me To Solve This Question by Nobody: 7:39pm On May 26, 2020

Good evening to everyone. I have been trying to solve the question below all to no avail. I am even thinking that the question is wrong but I said let me show my maths gurus in the house.
The question is solve the simultaneous equation given
3^x=9^y

4^xy=2^x +2 (two raise to power x and a further addition of two. the second "two is not attached to the power x).

Thanks in anticipation.
dejt4u, mrshape , guiddoti, danielistics, NDSMELODY and other gurus

Re: Please Help Me To Solve This Question by tripplephi: 7:41pm On May 26, 2020

matex97:
Good evening to everyone. I have been trying to solve the question below all to no avail. I am even thinking that the question is wrong but I said let me show my maths gurus in the house.
The question is solve the simultaneous equation given
3^x=9^y

4^xy=2^x +2 (two raise to power x and a further addition of two. the second "two is not attached to the power x).

Thanks in anticipation.
dejt4u, mrshape , guiddoti, danielistics, NDSMELODY and other gurus

Pls download PHOTOMATH and solve it in seconds.... The app will even show the working.

Re: Please Help Me To Solve This Question by NDSMELODY(m): 9:55pm On May 26, 2020

matex97:
Good evening to everyone. I have been trying to solve the question below all to no avail. I am even thinking that the question is wrong but I said let me show my maths gurus in the house.
The question is solve the simultaneous equation given
3^x=9^y

4^xy=2^x +2 (two raise to power x and a further addition of two. the second "two is not attached to the power x).

Thanks in anticipation.
dejt4u, mrshape , guiddoti, danielistics, NDSMELODY and other gurus

here is my solution

Re: Please Help Me To Solve This Question by NDSMELODY(m): 9:58pm On May 26, 2020

matex97:
Good evening to everyone. I have been trying to solve the question below all to no avail. I am even thinking that the question is wrong but I said let me show my maths gurus in the house.
The question is solve the simultaneous equation given
3^x=9^y

4^xy=2^x +2 (two raise to power x and a further addition of two. the second "two is not attached to the power x).

Thanks in anticipation.
dejt4u, mrshape , guiddoti, danielistics, NDSMELODY and other gurus

Re: Please Help Me To Solve This Question by SomeHenro: 12:43am On May 27, 2020

NDSMELODY:
[/quote][quote author=NDSMELODY post=89994884]here is my solution

You tried but there's a rule of logarithm you didn't follow.
Log (A + B ) is not equal to Log A + Log B . It is mathematically wrong.
Rather Log (A×B) = Log A + Log B...Correct!
So check your work from where you took long of both side. There is error there. Again if you substitute your answers in the given equations it does not satisfy both equations. Which shows that the answer is incorrect.
I think there is more to the question. Good try though!

Re: Please Help Me To Solve This Question by NDSMELODY(m): 8:42am On May 27, 2020

SomeHenro:
You tried but there's a rule of logarithm you didn't follow.
Log (A + B ) is not equal to Log A + Log B . It is mathematically wrong.
Rather Log (A×B) = Log A + Log B...Correct!
So check your work from where you took long of both side. There is error there. Again if you substitute your answers in the given equations it does not satisfy both equations. Which shows that the answer is incorrect.
I think there is more to the question. Good try though!

bro i have tried both method b4 posting,it gives thesame equation meanwhile i didnt use the logarithm rule u stated above kindly check the workings again

Re: Please Help Me To Solve This Question by SomeHenro: 8:53am On May 27, 2020

NDSMELODY:
bro i have tried both method b4 posting,it gives thesame equation meanwhile i didnt use the logarithm rule u stated above kindly check the workings again

Check where you said " taking log of both sides"
Your next move when taking the long of the left hand side is mathematically wrong. Also, substitute your answers in both equations given and see if they will come out same in both equations. I have tried this question, so I know what I am saying.

Re: Please Help Me To Solve This Question by NDSMELODY(m): 9:20am On May 27, 2020

SomeHenro:
Check where you said " taking log of both sides"
Your next move when taking the long of the left hand side is mathematically wrong. Also, substitute your answers in both equations given and see if they will come out same in both equations. I have tried this question, so I know what I am saying.

this is what you are saying right?

Re: Please Help Me To Solve This Question by SomeHenro: 10:35am On May 27, 2020

NDSMELODY:
this is what you are saying right?

Even this one, there are some flaws there. But the one that caught my attention was the one immediately after your equation 5.

Re: Please Help Me To Solve This Question by NDSMELODY(m): 10:40am On May 27, 2020

SomeHenro:
Even this one, there are some flaws there. But the one that caught my attention was the one immediately after your equation 5.

agreed,kindly post ur solution i want to learn

Re: Please Help Me To Solve This Question by Nobody: 12:54pm On May 29, 2020

NDSMELODY:
here is my solution

Thank you very much boss. I am grateful. God will continually bless you

Re: Please Help Me To Solve This Question by NDSMELODY(m): 1:58pm On May 29, 2020

matex97:
Thank you very much boss. I am grateful. God will continually bless you

you are welcome

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