buktikan a. | a+b | ≤ |a|+|b| = b .| a-b | ≤ | a+b | =
Matematika
nurulwj
Pertanyaan
buktikan
a. | a+b | ≤ |a|+|b| =
b .| a-b | ≤ | a+b | =
a. | a+b | ≤ |a|+|b| =
b .| a-b | ≤ | a+b | =
1 Jawaban
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1. Jawaban xkuadratz
| a+b | ≤ |a|+|b|
misal
a = -1
b = 1
|-1+1| ≤ |-1|+|1|
0 ≤ 2 (terbukti)