# C2: Finding area of a curve Watch

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a) Find the area between the

Here is my workings out but it says the answer is 4 sq. units... what have I done wrong along the way?

*y**-*axis, and the curves*y = x*^{2}and*y =*2 + √2√*x*, given that the curves intersect at (2,4)Here is my workings out but it says the answer is 4 sq. units... what have I done wrong along the way?

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#2

(Original post by

a) Find the area between the

Here is my workings out but it says the answer is 4 sq. units... what have I done wrong along the way?

**ckfeister**)a) Find the area between the

*y**-*axis, and the curves*y = x*^{2}and*y =*2 + √2√*x*, given that the curves intersect at (2,4)Here is my workings out but it says the answer is 4 sq. units... what have I done wrong along the way?

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(Original post by

Check your second integration - the integral of 2 is not 2 and the second term is also incorrect.

**Muttley79**)Check your second integration - the integral of 2 is not 2 and the second term is also incorrect.

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**Muttley79**)

Check your second integration - the integral of 2 is not 2 and the second term is also incorrect.

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#5

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Ohh forgot to do the bottom part, I got 68/9 for second part, but got 44/9 sq.unit now (4.8888...) what else have I done wrong?

**ckfeister**)Ohh forgot to do the bottom part, I got 68/9 for second part, but got 44/9 sq.unit now (4.8888...) what else have I done wrong?

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#6

**ckfeister**)

Ohh forgot to do the bottom part, I got 68/9 for second part, but got 44/9 sq.unit now (4.8888...) what else have I done wrong?

Have another go and please post your working if you don't get it.

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(Original post by

They want the area between the curcve and the Y AXIS ... what are you finding?

**Muttley79**)They want the area between the curcve and the Y AXIS ... what are you finding?

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(Original post by

You should be getting 20/3 for your second integral.

Have another go and please post your working if you don't get it.

**notnek**)You should be getting 20/3 for your second integral.

Have another go and please post your working if you don't get it.

I can't see how I can improve from this... can you hint it out?

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#9

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(Original post by

Check what you are doing - I can't see that you are finding the right area - where are you dealing with the y-axis?

**Muttley79**)Check what you are doing - I can't see that you are finding the right area - where are you dealing with the y-axis?

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#11

(Original post by

(2,4) is the intersecting points, so I'm using 2,0, this is the area for area B (one thats wrong) I don't see how it 20/3 but somehow it is.

**ckfeister**)(2,4) is the intersecting points, so I'm using 2,0, this is the area for area B (one thats wrong) I don't see how it 20/3 but somehow it is.

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#12

Remember that is just a number like so hink about how you integrate and do a similar thing here.

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#13

(Original post by

a) Find the area between the

**ckfeister**)a) Find the area between the

*y**-*axis, and the curves*y = x*^{2}and*y =*2 + √2√*x*, given that the curves intersect at (2,4)Are you sure you posted the question correctly? It doesn't really make sense. The area between the two curves is 4 so I assumed that was the question.

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(Original post by

I just noticed that the question includes the y-axis, as Muttley has pointed out.

Are you sure you posted the question correctly? It doesn't really make sense. The area between the two curves is 4 so I assumed that was the question.

**notnek**)I just noticed that the question includes the y-axis, as Muttley has pointed out.

Are you sure you posted the question correctly? It doesn't really make sense. The area between the two curves is 4 so I assumed that was the question.

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(Original post by

The area should be integrated with respect to y shouldn't it...

**Muttley79**)The area should be integrated with respect to y shouldn't it...

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#16

(Original post by

Not according to the question, its all y = (..)

**ckfeister**)Not according to the question, its all y = (..)

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(Original post by

Irrelevant - what you are doing is finding the area between the curve and the x-axis.

**Muttley79**)Irrelevant - what you are doing is finding the area between the curve and the x-axis.

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#18

(Original post by

Irrelevant - what you are doing at the moment is finding the area between the curve and the x-axis.

**Muttley79**)Irrelevant - what you are doing at the moment is finding the area between the curve and the x-axis.

The questions asks for the area bounded by the two curves and the y-axis.

The OP is finding the area below the blue curve and subtracting the area below the black curve.

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#19

(Original post by

...

**ckfeister**)...

The question is fine.

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#20

(Original post by

The OP's method will work.

The questions asks for the area bounded by the two curves and the y-axis.

The OP is finding the area below the blue curve and subtracting the area below the black curve.

**notnek**)The OP's method will work.

The questions asks for the area bounded by the two curves and the y-axis.

The OP is finding the area below the blue curve and subtracting the area below the black curve.

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