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x⇒1 x² - 1
lim (x + 3) (x - 1)
x⇒1 (x + 1) (x - 1)
lim x + 3
x⇒1 x + 1
= 1 + 3
1 + 1
= 4
2
= 2
b. lim √x - 1
x⇒1 x pangkat 4 - x
lim √x - 1 x √x + 1
x⇒1 x pangkat 4 √x + 1
lim x + √x - √x - 1
x⇒1 (x pangkat 4 - x) (√x + 1)
lim x - 1
x⇒1 x (x² - 1) (√x + 1)
lim x - 1
x⇒1 x (x² + x + 1) (x - 1) ( √x + 1)
lim 1
x⇒1 x (x² + x + 1) (√x + 1)
= 1
1 (1² + 1 + 1) ( √1 + 1)
= 1
1 ( 1 + 1 + 1 ) ( 1 + 1 )
= 2
1 (3) (2)
= 1/6
c. lim x² - 4
x⇒0 2 (x - 2)
lim (x + 2) (x - 2)
x⇒0 2 (x - 2)
lim x + 2
x⇒0 2
= 0 + 2
2
= 2
2
= 1