JAWABAN 1731130036 YUSTIKA AYU SALSABILA
JAWABAN SOAL 1
1. A = 3i + 3j, B = 4i - 2j
= B + A = 4i - 2j + 3i + 3j = 7i + j
= | B + A|
= 4i - 2j + 3i + 3j = 7i + j
= √(7)2 + (1)2 = √49+1 = √50
= 7.071
JAWABAN SOAL 2
2. X = 2i + 6, Y = 3i - 2j , Z= 2i + 4j
(Y x Z ) = ((3i-2j) x (2i + 4j))
= 3i x 2i + 3i x 4j + (-2j) x 2i + (-2j) x 4j = 0 + 12k + (-4k) + 0
= 8k
8K . X = 8k . (2i + 4j) = 8k . 2i + 8k . 4j = 0+0 = 0
1. A = 3i + 3j, B = 4i - 2j
= B + A = 4i - 2j + 3i + 3j = 7i + j
= | B + A|
= 4i - 2j + 3i + 3j = 7i + j
= √(7)2 + (1)2 = √49+1 = √50
= 7.071
JAWABAN SOAL 2
2. X = 2i + 6, Y = 3i - 2j , Z= 2i + 4j
(Y x Z ) = ((3i-2j) x (2i + 4j))
= 3i x 2i + 3i x 4j + (-2j) x 2i + (-2j) x 4j = 0 + 12k + (-4k) + 0
= 8k
8K . X = 8k . (2i + 4j) = 8k . 2i + 8k . 4j = 0+0 = 0