Q.
For which of the following curves x+3y=23, the line is the tangent at the point 332,12?
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a
x2+y2=7
b
x2+9y2=9
c
y2=163x
d
2x2−18y2=9
answer is B.
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Detailed Solution
dydx=−13 and passes through 332, 12
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