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For the first part it would be a good idea to sketch out the graph. Then using the formula 'change in y/change in x' find the gradient of the line (-4/3). You can then either use the formula y=mx+c and pu...
Both equations should be given with variables of y and x. They may however not be given in the form y=mx+c where m and c are constants, the equation could be given in the form of a circle (y-a)2TRAnswered by Thomas R. • Maths tutor3172 Views
To integrate ln(x) we will have to use integration by parts.
The equation for integration by parts is: (then equation written on the whiteboard).
In the case of ln(x), let v=ln(x) ...
(x-2)(x+2) because the x values cancel out leaving the integer and x^2 value.
Volume=81 cm3
b=81/2x2
L=4x+4(2x)+ 4(b)
L=4(x)+4(2x)+4(81/2x2)
L=12x+ 162/x2
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