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Kelas 11 Matematika
Bab Limit

lim √(x (4x + 5) - 2x + 1)
x→∞

= lim √(4x² + 5x) - (2x - 1)) 
   x→∞

= lim (√(4x² + 5x) - √(4x² - 4x + 1))
   x→∞

a = 4; b = 5; c = 0; p = 4; q = -4; r = 1

Karena a = p = 4, maka

(b - q) / (2√a)
= (5 - (-4)) / (2 . √4)
= 9/(2 . 2)
= 9/4