1] For curve y = 4x3 - 2x2 . find the slope of the tangent at( 2,1 )
2] Find the intervals in which the following functionis strictly increasing or strictly decreasing : f ( x ) = 20 - 9x + 6x2 - x3.
Here are the links for the similar answer to your query.
(1)
https://www.meritnation.com/discuss/question/2954862/1/
https://www.meritnation.com/discuss/question/1971053/1/
(2)
http://cbse.meritnation.com/study-online/ncert-solutions/math/15/7168/application-of-derivatives/