MATEMATIKA KELAS 9
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Tarfi Madang
Used 4+ times
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30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Answer explanation
Untuk menyederhanakan bentuk \(2^3 \times 3^3 \times 5^3\), kita kalikan basisnya: \(2 \times 3 \times 5 = 30\). Maka, hasilnya adalah \(30^3\), yang merupakan pilihan yang benar.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
30
31
32
33
Answer explanation
Untuk menghitung nilai dari 4^0 + 6^2 - 7^1, kita lakukan langkah-langkah berikut: 4^0 = 1, 6^2 = 36, dan 7^1 = 7. Jadi, 1 + 36 - 7 = 30. Maka, nilai yang benar adalah 30.
3.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Answer explanation
Untuk menyederhanakan, gunakan hukum eksponen: \( (2^4)^5 = 2^{20} \) dan tambahkan \( 2^3 \) menjadi \( 2^{20} \times 2^3 = 2^{23} \). Jadi, bentuk sederhana adalah \( 2^{23} \).
4.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Hasil dari (-2)³ + (-5)² - (-3)³ adalah ………
– 60
– 44
44
60
Answer explanation
Hitung (-2)³ = -8, (-5)² = 25, dan (-3)³ = -27. Jadi, hasilnya adalah -8 + 25 - (-27) = -8 + 25 + 27 = 44. Karena ada tanda negatif, jawabannya adalah -44.
5.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
36
– 36
Answer explanation
Nilai dari \((-6)^{-2}\) dihitung dengan cara \(\frac{1}{(-6)^2}\). Karena \((-6)^2 = 36\), maka \(\frac{1}{36}\) adalah hasilnya. Jadi, jawaban yang benar adalah \(\frac{1}{36}\).
6.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Answer explanation
Untuk mengubah bentuk \(5^{-4} \times 5^{-10}\) menjadi pangkat positif, kita gunakan aturan pangkat: \(a^m \times a^n = a^{m+n}\). Jadi, \(5^{-4} \times 5^{-10} = 5^{-14}\). Bentuk positifnya adalah \(\frac{1}{5^{14}}\).
7.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Answer explanation
Untuk menyederhanakan \(\frac{8x^{-4}}{2x^{-6}}\), bagi koefisiennya: \(\frac{8}{2} = 4\). Untuk variabel, gunakan aturan pangkat: \(x^{-4} \div x^{-6} = x^{-4 - (-6)} = x^{2}\). Jadi, hasilnya adalah \(4x^{2}\).
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