Mohon dibantu yah kak, yang no.11,12,dan 13. Terimakasih. No spam yah. Yang tidak bisa mohon untuk tidak menjawab asal.

11) Lim (1/(4a + 9) .......... kali (1/a)/(1/a)
= Lim (1/a) / (4a/a + 9/a)
= 0 / (4 + 0)
= 0/4
= 0

12) Lim (x^2 - 4)/(x^2 - 3x + 2) ...... kali (1/x^2)/(1/x^2)
= Lim (x^2/x^2 - 4/x^2)/(x^2/x^2 - 3x/x^2 + 2/x^2)
= Lim (1 - 4/x^2) / (1 - 3/x + 2/x^2)
= (1 - 0)/(1 - 0 + 0)
= 1/1
= 1

13) Lim 3x/(2 - √(4 - x)) . (2 + √(4 - x))/(2 + √(4 - x))
= Lim 3x(2 + √(4 - x)) / (4 - (4 - x))
= Lim 3x(2 + √(4 - x)) / x
= Lim 3(2 + √(4 - x))
= 3(2 + √(4 - 0)
= 3(2 + 2)
= 12

11) lim a→∞ 1/a/(4a +9)
= lim a→∞ 1/a/4a/a + 9/a
= 0 / 4
= 0

12) lim x→∞ (x²-4) / (x²-3x+2)
= lim x→∞ (x+2)(x-2) / (x-1)(x-2)
= lim x→∞ x+2/(x-1)
= lim x→∞ x/x + 2/x / (x/x - 1/x)
= 1/1 = 1

13) lim x→0 3x / 2-√(4-x) * 2+√(4-x) / 2+√(4-x)
= lim x→0 3x (2+√(4-x)) / 4 - 4 + x
= lim x→0 3x(2+√(4-x)) / x
= lim x→0 3 (2+√(4-x))
= 3*(2 + √(4-0))
= 3*(2 + √4)
= 3 * 4
= 12

semoga membantu :)