Question

Помогите решить.
Lim стремится к 5. X^2-9x+20/2x-10

Answer 1

Lim (x-> 5)( X^2-9x+20)/(2x-10) = Lim (x-> 5)( X-4)(x -5)/2(x-5) = Lim (x-> 5)( X-4)/2 = 1/2

x^2 - 9x + 20 = (x - 4)(x - 5)

D = 81 - 80 = 1

x12 = (9 +- 1)/2 = 4  5