Pembahasan:
lim x – 4 ₌ lim x – 4 × √x + 2
x￫4 √x – 2 x￫4 √x – 2 √x + 2
₌ lim (x – 4)(√x + 2)
x￫4 x – 4
₌ lim √x + 2
x￫4
= √4 + 2
= 4
Cara lain:
lim x – 4 ₌ lim x – 4
x￫4 √x – 2 x￫4 x½ – 2
₌ lim 1
x￫4 ½x⁻½
₌ lim 1
x￫4 1/2x½
₌ lim 1
x￫4 1/2√x
₌ lim 2√x
x￫4
= 2√4
= 2.2
= 4