TF MATEMATIKA PEMINATAN 20 MIPA 04
Quiz
•
Mathematics
•
10th Grade
•
Hard
Retmasari Cindy
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui vektor a = pi − 3j + 9k dan b = 2i + 2j + k. Jika |c| adalah panjang proyeksi vektor a pada b dan |c| = 3, nilai p adalah ….
-1
2
5/2
3
4
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui vektor u = i + 2j − 2k dan v = −3i − j + ak. Proyeksi skalar vektor v pada u adalah 5/3. Nilai a = ….
5
3
2
-3
-5
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui vektor a = 4i − 2j + 2k dan vektor b = 2i − 6j + 4k. Proyeksi vektor ortogonal vektor a terhadap vektor b adalah ….
i − j + k
i − 3j + 2k
i − 4j + 4k
2i − j + k
6i − 8j + 6k
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui vektor a = 3i − 2j + 4k dan b = −i + j + 2k. Proyeksi orthogonal a terhadap b adalah ….
1/6 (−i + j + 2k)
1/3 (−i + j + 2k)
1/2 (−i + j + 2k)
−i + j + 2k
−2i + 2j + 4k
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Proyeksi ortogonal vektor a = 4i + j + 3k pada b = 2i + j + 3k adalah ….
13/14 (2i + j + 3k)
15/14 (2i + j + 3k)
8/7 (2i + j + 3k)
9/7 (2i + j + 3k)
4i + 2j + 6k
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui titik A (5, 1, 3); B (2, -1, -1) dan C (4, 2, -4). Besar <ABC adalah ...
π
π/2
π/3
π/6
0
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui titik P (2, 7, 8) dan Q(-1, 1, -1). Titik R membagi PQ di dalam dengan perbandingan 2 : 1 panjang vektor PR = ...
√4
√6
√12
√14
√56
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