Pembahasan:
lim x = …
x￫0 √4 + x – √4 – x
⇒ lim x × √4 + x + √4 – x
x￫0 √4 + x – √4 – x √4 + x + √4 – x
⇒ lim x(√4 + x + √4 – x)
x￫0 (4 + x) – (4 – x)
⇒ lim x(√4 + x + √4 – x)
x￫0 2x
⇒ lim √4 + x + √4 – x = 2 + 2 = 2
x￫0 2 2
Cara lain:
Kaprikornus,
⇒ lim x = 2.1.√4 = 2
x￫0 √4 + x – √4 – x 2.1