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If the line ax + by + c = 0 is a normal to the curve xy = 1, then

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If the line ax + by + c = 0 is a normal to the curve xy = 1, then

(a) a > 0, b > 0

(b) a > 0, 6 < 0

(c) a < 0, b > 0

(d) a < 0, b < 0

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1 Answer

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Best answer

Correct option 

(b) a > 0, 6 < 0

(c) a < 0, b > 0

Explanation :

Thus, slope of normal = x2 (which is always positive) and it is given ax + by + c = 0 is normal whose slope = - a/b.

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