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Question

The two curves x33xy2+2=0 and 3x2yy3=2

A
touch each other
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B
cut at right angle
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C
cut at angle π3
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D
cut at angle π4
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Solution

The correct option is B cut at right angle
x33xy2+2=0
dydx=x2y22xy=m1 (say)

3x2yy3=2
dydx=2xyx2y2=m2 (say)
Product of the slopes at any point (x,y)=m1×m2=1
Therefore, the curves are orthogonal and cut each other at right angle.

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