Question

If the tangent is parallel to the y-axis then what is the value of /dx​

Answer 1

Answer:

Step-by-step explanation:

Given equation of curve is x+y=e  

xy

 

⇒  

dx

dy

​  

=  

1−xe  

xy

 

y−1

​  

 

Since, the tangent is parallel to y-axis,

dx

dy

​  

=  

0

1

​  

 

⇒xe  

xy

=1

Also, y=0 on the line parallel to y-axis

⇒x=1

Hence, the required point is (1,0)