Logarithms!!!
WHY ARE LOGARITHMS SO HARDDDDD.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
Scroll to see replies
Original post by Lord Frieza
WHY ARE LOGARITHMS SO HARDDDDD.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
Are you sure that the question has two = signs
Original post by Lord Frieza
WHY ARE LOGARITHMS SO HARDDDDD.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
I've been practising for 12 hours and I still can't grasp it, especially when they ask for damn quadratic logs.
I've been CRYING OVER THIS QUESTION!!!!
Prove that if a^x = b^y = (ab)^xy, then x + y = 1
I'M GOING INSANE X_X
C2 exam... I'll see you in a retake.
There's a mistake in this question. x=y=0 is a counterexample.
Original post by notnek
There's a mistake in this question. x=y=0 is a counterexample.
+1.
If you REALLY want to use logs... (as opposed to just exponents)
Then you would log_ab everything. This would give you a new equation.
Split the equation of three into two equation of twos, do some VERY simple algebra to each, and everything you want will come easily.
Then you would log_ab everything. This would give you a new equation.
Split the equation of three into two equation of twos, do some VERY simple algebra to each, and everything you want will come easily.
(edited 11 years ago)
There's no mistake in the question, it's a standard exam style question written exactly like that, can anyone write down a worked solution??!?!?!
Original post by notnek
The question does have mistakes and is definitely not a C2 exam question.
Where did you get the question from? My advice: if the question is making you go insane, give up. Focus on real C2 exam questions.
Where did you get the question from? My advice: if the question is making you go insane, give up. Focus on real C2 exam questions.
a^x = b^y = (ab)^xy, then x + y = 1
a^x - b^y = (ab)^xy, then x + y = 1
= (Loga + Logb)^xy = Xloga - ylogb
I am so confused..
a^x - b^y = (ab)^xy, then x + y = 1
= (Loga + Logb)^xy = Xloga - ylogb
I am so confused..
Original post by notnek
The question does have mistakes and is definitely not a C2 exam question.
Where did you get the question from? My advice: if the question is making you go insane, give up. Focus on real C2 exam questions.
Where did you get the question from? My advice: if the question is making you go insane, give up. Focus on real C2 exam questions.
It's in the official edexcel C2 book. Mixed exercise 3G Q10. There's no mistake.
Original post by SheldonWannabe
It's in the official edexcel C2 book. Mixed exercise 3G Q10. There's no mistake.
Yeaah that's the one!
Edit: There's a big fat 'E' next to it.. as in EXAM QUESTION.
(edited 11 years ago)
Original post by Lord Frieza
Yeaah that's the one!
I know it off by heart because that's the one logs questions I can't do either.
Original post by SheldonWannabe
It's in the official edexcel C2 book. Mixed exercise 3G Q10. There's no mistake.
As I showed in my first post, if it's written as the OP posted it, it's wrong.
Original post by SheldonWannabe
I know it off by heart because that's the one logs questions I can't do either.
You can do the other 11 questions..?\
They are so hard for me
Original post by notnek
As I showed in my first post, if it's written as the OP posted it, it's wrong.
Dude. -.-
Original post by Lord Frieza
Yeaah that's the one!
Edit: There's a big fat 'E' next to it.. as in EXAM QUESTION.
Edit: There's a big fat 'E' next to it.. as in EXAM QUESTION.
Most likely it has been copied from an exam incorrectly.
Can you explain why you negged me? Try inputting x=y=0 and a=b=1.
Original post by Lord Frieza
Yeaah that's the one!
If your stuck here's a bit of guidance for forming your first equation
Spoiler
(edited 11 years ago)
Yeah I remember this question in my Edexcel C2 book, it got me as well.
Original post by notnek
Most likely it has been copied from an exam incorrectly.
Can you explain why you negged me? Try inputting x=y=0 and a=b=1.
Can you explain why you negged me? Try inputting x=y=0 and a=b=1.
I didn't neg you, but even on the cd it's the same question. There's no mistake whatsoever!
(edited 11 years ago)
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