Jika (1/a) + (1/b) = 7 dan (1/a) – (1/b) = 3, maka nilai (1/a)2 – (1/b)2 = ….
Matematika
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Pertanyaan
Jika (1/a) + (1/b) = 7 dan (1/a) – (1/b) = 3, maka nilai (1/a)2 – (1/b)2 = ….
1 Jawaban
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1. Jawaban Anonyme
(1/a)² -(1/b)² = (1/a + 1/b)(1/a - 1/b)
(1/a)² -(1/b)² = (7)(3)= 21