# A Level Maths

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#41

(Original post by

On the grid is there already a curve? If so, what is the equation of the curve?

**JamesF**)On the grid is there already a curve? If so, what is the equation of the curve?

y = x^3 + 2

it's a bendy curve thing

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#42

(Original post by

Draw a line when x=0, and read off the figures for the solutions (ie when they cross the lines)

**2776**)Draw a line when x=0, and read off the figures for the solutions (ie when they cross the lines)

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#43

(Original post by

i don't understand what you mean *thinks*

**me!**)i don't understand what you mean *thinks*

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#44

(Original post by

You could help me if you want

"By drawing a suitable straight line on the grid find estimates of the solutions of the equation x^3 - 4x + 2 = 0"

It's from a past gcse paper - it confused me because it's not a straight line...

**me!**)You could help me if you want

"By drawing a suitable straight line on the grid find estimates of the solutions of the equation x^3 - 4x + 2 = 0"

It's from a past gcse paper - it confused me because it's not a straight line...

Remember, the line y = 0 [b[is[/b] the x-axis (evidently), therefore the solutions to the equation x^3 - 4x + 2 = 0 is when the graph of this function cuts y = 0 i.e.) the x-axis.

Say the graph, for example, crosses the line y = 0 (the x-axis) at x = 2 and x = 4. The solutions to the equation x^3 - 4x + 2 = 0 would be x = 2, x = 4.

EDIT: IN LIGHT OF THE FACT THAT THERE IS INFACT ANOTHER GRAPH INVOLVED, AND NOT JUST THIS ONE, SCRAP WHAT I SAID ABOVE!

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#45

(Original post by

Scratch that, I thought you were given the curve and only needed to draw the line x=0. Very naieve of me.

**2776**)Scratch that, I thought you were given the curve and only needed to draw the line x=0. Very naieve of me.

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#46

**2776**)

Scratch that, I thought you were given the curve and only needed to draw the line x=0. Very naieve of me.

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#47

You have the line y = x^3 + 2, and you want the line y = x^3 - 4x + 2, so draw the line y = 4x

Now we have

4x = x^3 + 2

0 = x^3 - 4x + 2

So, when you draw the line y=4x, the solutions are the points where the line and curve cross.

Now we have

4x = x^3 + 2

0 = x^3 - 4x + 2

So, when you draw the line y=4x, the solutions are the points where the line and curve cross.

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#48

**2776**)

Scratch that, I thought you were given the curve and only needed to draw the line x=0. Very naieve of me.

**is**the x-axis.

The line x = 0

**is**the y-axis.

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#49

(Original post by

You have the line y = x^3 + 2, and you want the line y = x^3 - 4x + 2, so draw the line y = 4x

Now we have

4x = x^3 + 2

0 = x^3 - 4x + 2

So, when you draw the line y=4x, the solutions are the points where the line and curve cross.

**JamesF**)You have the line y = x^3 + 2, and you want the line y = x^3 - 4x + 2, so draw the line y = 4x

Now we have

4x = x^3 + 2

0 = x^3 - 4x + 2

So, when you draw the line y=4x, the solutions are the points where the line and curve cross.

the only other questions annoying me on the paper were (5p^3 / q)^3

for which I got 125p^9/q^3, is this right?

and (12t^5/u^4)(u^3/3t^2) for which I got 4t^3/u...

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#50

(Original post by

cool - thanks

the only other questions annoying me on the paper were (5p^3 / q)^3

for which I got 125p^9/q^3, is this right?

and (12t^5/u^4)(u^3/3t^2) for which I got 4t^3/u...

**me!**)cool - thanks

the only other questions annoying me on the paper were (5p^3 / q)^3

for which I got 125p^9/q^3, is this right?

and (12t^5/u^4)(u^3/3t^2) for which I got 4t^3/u...

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#51

(Original post by

Both correct

**JamesF**)Both correct

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#52

I do maths with stats, so its 2 modules of pure, and 1 of stats, and every week we have 200 mins pure, and 100 mins stats. if we had anything less than that it wouldn't be too good! we are rushing in pure as it is! 2 hours for maths&further maths is just plain ridiculous! that just doesn't seem fair to me!

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#53

(Original post by

The line y = 0

The line x = 0

**bono**)The line y = 0

**is**the x-axis.The line x = 0

**is**the y-axis.
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#54

(Original post by

Asn you so have often pointed out my typos.

**2776**)Asn you so have often pointed out my typos.

Don't worry mate, it happens - even to the best!

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#55

(Original post by

I do maths with stats, so its 2 modules of pure, and 1 of stats, and every week we have 200 mins pure, and 100 mins stats. if we had anything less than that it wouldn't be too good! we are rushing in pure as it is! 2 hours for maths&further maths is just plain ridiculous! that just doesn't seem fair to me!

**Dill**)I do maths with stats, so its 2 modules of pure, and 1 of stats, and every week we have 200 mins pure, and 100 mins stats. if we had anything less than that it wouldn't be too good! we are rushing in pure as it is! 2 hours for maths&further maths is just plain ridiculous! that just doesn't seem fair to me!

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