Limit mendekati 0 sin 2x . Cos 4x - sin 2x / 8x^3 =
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Limit mendekati 0 sin 2x . Cos 4x - sin 2x / 8x^3 =
1 Jawaban
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1. Jawaban arsetpopeye
Lim (sin 2x cos 4x - sin 2x) / (8x^3)
= Lim sin 2x (cos 4x - 1) / (8x^3)
= Lim sin 2x . (-2 sin^2 2x) / (8x^3)
= Lim -2/8 . (sin 2x)/x . (sin 2x)/x . (sin 2x)/x
= -1/4 . 2 . 2 . 2
= -2