If y= (a x+b) , then what is d^2 y d x^2 at x=- b a , where a, b are constants and a 0 ?

Step-by-step solution

aligned & d y d x =a (a x+b) & d^2 y d x^2 =-a^2 (a x+b)=-a^2 (0)=0 aligned