Why does the + 18 in step 2 become -18 in the working out below. Please explain in detail and this formula is calculating the first derivative of a function.

Question

asked Apr 3, 2023 153k views

1 Answer

Brmore · Answer 1 · 2023-04-07T21:57:12+0000

Explanation:

18/x is the same as 18•x-¹

derivative of ax^n=n•ax^n-1

derivative of 18•x-¹= -1•18•x-²

= -18x-² which is the same as -18/x²

hence 2-18/x²