Question
Question: If the line ax +by + c = 0 is a normal to the curve xy = 1 then...
If the line ax +by + c = 0 is a normal to the curve xy = 1 then
A
a, b, ∈ R
B
a > 0, b > 0
C
a < 0, b > 0 or a > 0, b < 0
D
a < 0. b < 0
Answer
a < 0, b > 0 or a > 0, b < 0
Explanation
Solution
ax + by + c = 0 is
Normal to xy = 1
compare the slopes of Normal