What type of wave could measure 5 meters in length?

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What type of wave could measure 5 meters in length?

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Kim Cúc 3 days 2021-07-22T16:03:31+00:00 1 Answers 1 views 0

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    2021-07-22T16:05:14+00:00

    — A sound wave at 68 Hz . . . like from the piano key 2 octaves below middle-C .

    — A radio wave at 60 MHz . . . the upper edge of the old analog TV channel-2 .

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