Math help (1 Viewer)

[deswa1]

Fawun- your working is correct- textbook is wrong (unless if you copied the question wrong?)

 

[Sy123]

Yeah but I get some random number.

The answer is root 7 that's why I asked.

Derp, i know how to differentiate.

The answer should be:



Either the answer is wrong or you misread the answer (or misread question). I differentiated it myself to see if you differentiated incorrectly but it is correct

 

[Fawun]

Fawun- your working is correct- textbook is wrong (unless if you copied the question wrong?)

okay sweet and nah I didn't haha. How did you get that 1/root7 blah thing before?

 

[RealiseNothing]

Okay thank you so much! It was a clear and good explanation!

Would you mind checking this question for me to see that i'm on the right track please? (can't be bothered latexing the whole thing up)

I don't know where to go next. I was thinking of factorising it but they have different powers :s

Would you be able to give me a hint as to where to go next?

For future reference if you want to factorise:

 

[Fawun]

The answer should be:



Either the answer is wrong or you misread the answer (or misread question). I differentiated it myself to see if you differentiated incorrectly but it is correct

How did you get that from where I left off? :s

For future reference if you want to factorise:

wut.

WHy did you put the x (the one on the outside) into the second bracket? why not the first one?

 

[deswa1]

okay sweet and nah I didn't haha. How did you get that 1/root7 blah thing before?

Sub in x=1- the bit on the left becomes 1(7)^-1/2 which is 1/root7

 

[Fawun]

Sub in x=1- the bit on the left becomes 1(7)^-1/2 which is 1/root7

Oh yeah derp moment lmao

 

[RealiseNothing]

wut.

WHy did you put the x (the one on the outside) into the second bracket? why not the first one?

I factored out the so everything that was left went to the second bracket.

 

[twinklegal19]

^he's basically just factoring out the lowest power/highest common denominator

 

[HeroicPandas]

Re: Math help (Because Carrot made me do this)

So how would I go in doing this question? I'm stuck :s



This is all I have so far:









Which is neither an even or an odd function.

x-intercept:







y-intercept:





vertical asymptote:





horizontal asymptote:











But I don't get it. How can x (which is infinity) be the horizontal asymptote?

y=x oblique asymptote

 

[Fawun]

I've already done sum and products of roots. I just don't know how to apply it in this question :/

 

[SpiralFlex]

The quadratic equation will have two roots. If I have for example a root of x=5 and x=-5, we say that these roots have the same magnitude but are opposite in sign.

So if I let two roots of the above equation be,



and



Sum of the roots:

 

[Fawun]

The quadratic equation will have two roots. If I have for example a root of x=5 and x=-5, we say that these roots have the same magnitude but are opposite in sign.

So if I let two roots of the above equation be,



and



Sum of the roots:

Why didn't you do the products of them?

 

[RealiseNothing]

Why didn't you do the products of them?

The product doesn't have a 'k'.

 

[Sy123]

Why didn't you do the products of them?

How would we get the actual value of k if we used products of roots?

 

[Fawun]

So we only do the ones that have the k in it?

So from all this time, i've tried to do both of it lol

 

[hayabusaboston]

I am confused. How come pretty much EVERYONE on here is so passionate and enthusiastic about maths? me personally, I like and enjoy it, but somehow I feel like people here are totally engrossed in it lol. Im confused as to how there's so many maths lovers, that is all.

 

[Fawun]

So we only do the ones that have the k in it?

So from all this time, i've tried to do both of it lol

Wait. How does that work then? Because for this question:



and this is what I have so far:









???

What do I do next? because there are two unknowns?

 

[Fawun]

I am confused. How come pretty much EVERYONE on here is so passionate and enthusiastic about maths? me personally, I like and enjoy it, but somehow I feel like people here are totally engrossed in it lol. Im confused as to how there's so many maths lovers, that is all.

>implying that I like maths

 

[SpiralFlex]

Wait. How does that work then? Because for this question:



and this is what I have so far:









???

What do I do next? because there are two unknowns?

1. Use alpha, don't interchange alphe with "a".

2. Use the product of the roots since you only get one variable.










When alpha is -2,




When alpha is 1




Hence there are two pairs of solutions:

The roots are -2, -1 or 1, 2.