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Question

Let C1 & C2 be two curves passing through the origin as shown in the figure A curve C is said to "bisect the area" the region between C1 & C1 if for each point P of C the two shaded regions A & B shown in the figure have equal areas Determine the upper curve C2 given that the bisecting curve C has the equation y=x2 & that the lower curve C1 has the equation y=x2/2
261710_21f627180e0e4e76a665804f347bc987.png

A
(16/9)x2
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B
(25/9)x2
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C
(25/16)x2
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D
(9/25)x2
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Solution

The correct option is A (16/9)x2
According to question
a20(f1(y)+y)dy=a0(x2x22)dx
[f1(a2)a]2a=a22f1(a2)=3a4f(3a4)a2
or f(x)=169x2
363683_261710_ans_bc44fc20a38845e29ed75307abb057b5.png

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