Find the point on the curve y = x2 – 2x + 3, where the tangent is parallel to x-axis.
Given curve y = x2 – 2x + 3
We know that the slope of the x-axis is 0.
Let the required point be (a, b).
∵ the point lies on the given curve
∴ b = a2 – 2a + 3 ….(1)
Now, y = x2 – 2x + 3
Slope of the tangent at (a, b) = 2a – 2
According to the question,
2a – 2 = 0
⇒ a = 1
Putting this in (1),
b = 1 – 2 +3
⇒ b = 2
So, the required point is (1, 2)