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<a https://www.thestudentroom.co.uk/showthread.php?t=7467335'> Year 12s: what will be the first way you research your future options? >>

advanced higher maths help

in this question I've to find, in tearms of pi, the volume of the solid revolution formed.
I know how to solve the problem but how do I find the limits?
image-90b9bf9d-4c05-4d07-b1cf-b0aa23c2d69b259154232548036737-compressed.jpg.jpeg
Original post by Bananasplitxxx
in this question I've to find, in tearms of pi, the volume of the solid revolution formed.
I know how to solve the problem but how do I find the limits?


Are you rotating about the x axis or the y axis?
Original post by RDKGames
Are you rotating about the x axis or the y axis?


I'm guessing the x axis as all the others were the x axis.
Original post by Bananasplitxxx
I'm guessing the x axis as all the others were the x axis.


So then you need limits for x.

The portion you are rotating clearly begins at x=0 hopefully this is obvious, and the next limit along is where this portion ends. Clearly it ends where the curve cuts the x axis.

So solve 4-x^2=0 for the upper limit.
has a number not photo copied or something?

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