Step-by-step explanation:
it's the The Definition of Differentiation
f(x)= 2x+3
= 2 after the Differentiation
using the definition of Differentiation
[tex] \frac{2(x + h) + 3 - (2x + 3)}{h} = \\ \frac{2x + 2h + 3 - 2x - 3}{h} \\ = \frac{2h}{h} = 2[/tex]
