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# C2 - Exercise 11c - Q.5 - Answer?? watch

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1. As above really...need help....not getting actual answer...
2. Textbook? Post the question here please, bearing in mind most people probably won't have the same textbook as you !
3. Sketch the following and find the area of the finite region or regions bounded by the curves and the x-axis: y = x (x - 2) (x - 5) .

4. Anyone for the above listed question...?
5. (Original post by lgeerthan)
Anyone for the above listed question...?
curve cuts x-axis at x= 0,2,5. Sketch curve.
Enclosed area, therefore limits, between x=2 and x=0

∫x³ -7x² +10x dx
=¼x^4 -(7/3)x³+5x²
limits 2 and 0 give

4 -(56/3) +20 = 16/3
6. (Original post by Aitch)
curve cuts x-axis at x= 0,2,5. Sketch curve.
Enclosed area, therefore limits, between x=2 and x=0

∫x³ -7x² +10x dx
=¼x^4 -(7/3)x³+5x²
limits 2 and 0 give

4 -(56/3) +20 = 16/3
And then isnt there a limit of 2 and 5??
7. (Original post by lgeerthan)
And then isnt there a limit of 2 and 5??
Oops! Yes!

¼x^4 -(7/3)x³+5x²
limits 5 and 2 give

[(625/4)-(875/3)+125]-[16/3]
=(-)15.75

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Updated: December 21, 2005
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