Hello, in applications of differenciation problem 2B-1. I think there is a mistake with problem 2B-1b. graph y=x^4-4x+1... in the solutions the derivative is wrong; so is the rest of that solution.

(The derivative should be 4x^3 - 4... The factor "4" is missing in the solution.)

Question

Hello, in applications of differenciation problem 2B-1. I think there is a mistake with problem 2B-1b. graph y=x^4-4x+1... in the solutions the derivative is wrong; so is the rest of that solution. 

(The derivative should be 4x^3 - 4... The factor "4" is missing in the solution.)

anonymous · Answer

Found someone else had also spotted that! So yeah the answer key has some mistakes :)