78 - The points on the curve y = x4 - 4x3 + 4x2 + 1

Disclaimer: This website is NOT associated with CBSE, for official website of CBSE visit - www.cbse.gov.in

The points on the curve y = x4 - 4x3 + 4x2 + 1 at which the tangents are parallel to x-axis are?