lim x趨向0 [x(1-cos2x)]/(5x-sin5x)?
lim x趨向0 [x(1-cos2x)]/(5x-sin5x)?
知道答案是12/125,
知道答案是12/125,
數(shù)學(xué)人氣：434 ℃時間：2020-02-25 12:45:38
優(yōu)質(zhì)解答
lim x趨向0 [x(1-cos2x)]/(5x-sin5x)＝lim x趨向0 [x2(sinx)^2]/(5x-sin5x)=lim x趨向0 [2x^3]/(5x-sin5x)=lim x趨向0 [6x^2]/(5-5cos5x)＝lim x趨向0 [12x]/(25sin5x)＝lim x趨向0 [12]/(125cos5x)＝lim x趨向0 12/...
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