Question

Using the formula d=rt, find an expression for dd/dt

Answer 1

use the rule: if y = ax^(n) dy/dx = anx^(n-1)

Answer 2

here y = d, a = r , t = x and n = 1

Answer 3

so we get dd / dt = r*1 t^(1-1) = r t^0 = ?

Answer 4

what does anything to the power 0 equal?