lnx-x+2的图像
-2+lnx\u7684\u56fe\u50cf\u600e\u4e48\u753b\uff0c\u8981\u8be6\u56feX\u7684\u8303\u56f4\u5728 0<X<2
\u5f532-X>1,\u5373 \u7684\u65f6\u5019 0<X<1f(x)`=1/X + 1/(2-X) -1
\u5f531>2-X>0 \u53732>X>1 \u7684\u65f6\u5019
f(x)`=-1/x + 1/x-2 -1
\u5f53X=0 f(x)`=1+ln(2)
\u5f53X=2 f(x)`=ln(2)+3
\u73b0\u5bf9\u5176\u6c42\u5bfc\uff0cf'\uff08x\uff09=\uff081-x^2\uff09/x\u3010x\uff1e0\u3011
\u5f53f'\uff08x\uff09=0\u65f6\uff0c\u5f97\u5230x=\u00b11
\u5f53X\u2208\uff080,1\uff09\u65f6\uff0cf\uff08x\uff09\u5355\u8c03\u9012\u589e\u3002X\u2208\uff081,\u6b63\u65e0\u7a77\uff09\u65f6\uff0cf\uff08x\uff09\u5355\u8c03\u9012\u51cf
\u6240\u4ee5\u5f53x=1\u65f6\uff0cf\uff08x\uff09\u53d6\u5230\u6700\u5927\u503c\uff0cf\uff081\uff09= -1/2
\u6240\u4ee5\u56fe\u8c61\u5e94\u8be5\u5927\u81f4\u662f
\u56fe\u753b\u7684\u4e0d\u662f\u5f88\u597d\uff0c\u51d1\u548c\u7740\u770b\u5427
\u671b\u91c7\u7eb3\uff0cO(\u2229_\u2229)O\u8c22\u8c22
如图
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