How do you find the derivative of # y=8-(7x^3)#? Calculus Basic Differentiation Rules Power Rule 1 Answer Alan N. Sep 23, 2016 #y'=-21x^2# Explanation: #y=8-7x^3# #y'= 0-7*3x^(3-1) = -21x^2# (Power rule) Answer link Related questions How do you find the derivative of a polynomial? How do you find the derivative of #y =1/sqrt(x)#? How do you find the derivative of #y =4/sqrt(x)#? How do you find the derivative of #y =sqrt(2x)#? How do you find the derivative of #y =sqrt(3x)#? How do you find the derivative of #y =sqrt(x)#? How do you find the derivative of #y =sqrt(x)# using the definition of derivative? How do you find the derivative of #y =sqrt(3x+1)#? How do you find the derivative of #y =sqrt(9-x)#? How do you find the derivative of #y =sqrt(x-1)#? See all questions in Power Rule Impact of this question 1584 views around the world You can reuse this answer Creative Commons License