limit part 1 & part 2, jelaskan dengan caranya

19) Lim (x^2 - x - 2)/(x^2 - 2x)
x => 2

Lim (x - 2)(x + 1)/x(x - 2)
x=>2

Lim (x + 1)/x
x=>2

= (2 + 1)/2 = 3/2

20) Lim √(4x^2 + 7x + 1) - √(4x^2 - 4x + 1)
x => ~
a = 4, b = 7, c = 1, p = 4, q = -4, r = 1

= (b - q)/(2√a) = (7 - (-4)) / 2√4 = 11/4

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