Matematika Peminatan Sukino Kelas XII
Limit Fungsi Aljabar dan Fungsi Trigonometri
LKS 4
Soal dan Pembahasan Matematika Sukino Peminatan
Bagian B
4. Hitunglah nilai setiap limit berikut.
a. lim n →∞ [√n - √(n + a)]
b. lim y →∞ [√(2y2 - 3y + 10) - √(2y2 - (3 + 6√2)y + 5)]
c. lim x →∞ [2x - 1 - √(4x2 - 5x + 7)]
Jawaban :
a. lim n →∞ [√n - √(n + a)]
a = p = 1 (lihat √n)
b = 0
karena b = 0, maka Limit = 0
b. lim y →∞ [√(2y2 - 3y + 10) - √(2y2 - (3 + 6√2)y + 5)]
a = p =2
b = -3
q = - (3 + 6√2)
Limit = (-3 + 3 + 6√2) / 2√2
Limit = 6√2 / 2√2
Limit = 3
c. lim x →∞ [2x - 1 - √(4x2 - 5x + 7)]
buat dalam bentuk akar
lim x →∞ [√(4x2 - 4x + 1) - √(4x2 - 5x + 7)]
a = p = 4
b = -4
q = -5
Limit = ( -4 - (-5))/2√4
Limit = 1/4
a = p = 1 (lihat √n)
b = 0
karena b = 0, maka Limit = 0
b. lim y →∞ [√(2y2 - 3y + 10) - √(2y2 - (3 + 6√2)y + 5)]
a = p =2
b = -3
q = - (3 + 6√2)
Limit = (-3 + 3 + 6√2) / 2√2
Limit = 6√2 / 2√2
Limit = 3
c. lim x →∞ [2x - 1 - √(4x2 - 5x + 7)]
buat dalam bentuk akar
lim x →∞ [√(4x2 - 4x + 1) - √(4x2 - 5x + 7)]
a = p = 4
b = -4
q = -5
Limit = ( -4 - (-5))/2√4
Limit = 1/4
>> soal no 5
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