What is the speed of a wave that has a wavelength of 2 and a frequency of 2.5

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What is the speed of a wave that has a wavelength of 2 and a frequency of 2.5

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Diễm Kiều 1 year 2021-07-17T04:05:02+00:00 1 Answers 5 views 0

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    2021-07-17T04:06:17+00:00

    speed = wavelength x frequency = 2 x 2.5 = 5

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )