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Çó¼«ÏÞ lim(xÇ÷ÓÚ0)tan3x/sin2x
µ± $x to 0$ ʱ£¬$tan 3x$ ºÍ $sin 2x$ ¶¼Ç÷ÓÚ 0£¬Òò´ËÔ¼«ÏÞÊÇ $frac{0}{0}$ ÐͲ»¶¨Ê½¡£¿ÉÒÔÓ¦ÓÃÂ屨´ï·¨Ôò£¬¶Ô·Ö×ӺͷÖĸ·Ö±ðÇóµ¼£¬µÃµ½ $lim_{{x to...
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1.ÀûÓÃx¡ú0ʱtanx~sinx~x,Ôʽ=lim(x¡ú0)(3x)/(2x)=3/22.ÀûÓÃx¡ú0ʱsinx~x,Áît=x-1,ÔòÔʽ=lim(t¡ú0)sint/(t(t+2))=lim(t¡ú0)t/(t(t+2))=...
µ±xÇ÷½üÓÚ0ʱ,sin2x/tan3xµÄ¼«ÏÞÔõôÇó?
µ±xÇ÷ÏòÓڦРsin2xtan4xÓм«ÏÞÂð?Ϊʲô? 10 ¸ö»Ø´ð xÇ÷ÓÚ0,tanx-sinx¼«ÏÞΪ¶àÉÙ? 7 ¸ö»Ø´ð µ±xÇ÷½ü0ʱ,tanx¼õsinx³ýÒÔxµÄÈý´Î·½µÄ...
¡¾limxÇ÷½üÓÚ0(tan3x - sin2x)/xµÈÓÚ¶àÉÙ¡¿
limxÇ÷½üÓÚ0 (tan3x-sin2x)/x=limxÇ÷½üÓÚ0 ( 3tan3x sec^2 x-2cos2x)=0-2=-2ÓÃÂÞ±ØËþ·¨Ôò
limtan3x/sin2xÇóxÇý½üÓÚÁãµÄ¼«ÏÞ
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lim(xÇ÷ÏòÅÉ)sin2x/tan3x?
lim(x¡ú¦Ð) sin2x/tan3x =lim(x¡ú¦Ð) 2cos2x/(3/cos²3x)=2/3lim(x¡ú¦Ð) cos2xcos²3x =2/3,2,x¡ú0Ôò2x¡ú0£¬3x¡ú0 ËùÒÔsin2xºÍ2xÊÇ...
ÇóÏÂÁм«ÏÞÖµ1.Lim sin2x¨M3x x¡ú02.Lim tan5x¨Mxx¡ú0...
1x¡ú0,sinx=x;ËùÒÔsin2x=2x2x/3x=2/32x¡ú0,tanx=x;ËùÒÔtan5x=5x5x/x=5
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x+2\sin 2x-6xf'''(x)=6\tan^4x+8\tan^2x+4\cos2x-4f'''(x)=24\tan^5x+40\tan^3x+(16\tan x-8\sin 2x)>0f'''(0)...
lim( x¡ú0)sin2x / tan3x
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