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Jabarkan:
lim_x⇒∞ √[x²+3x+2] - √[x²+0x+0]
Mengingat rumus cepatnya:
= [Koefisien x yang kiri - Koefisien x yang kanan] / [2. Akar kuadrat koefisien x²]
= [3 - 0] / [2√1]
= 3/2 [B]
Nomor 14.
f(x) = 5 x^(2/5)
Maka, turunannya:
f'(x) = 5(2/5). x^(2/5 - 1)
f'(x) = 2x^(-3/5)
Maka:
f'(32) = 2(32)^(-3/5)
f'(32) = 2(2)⁻³
f'(32) = 2(1/8)
f'(32) = 1/4 = 0,25 [A]