苏科版八年级时代数学报第39期第三版B卷第12题，急，急，急！！
8\u4e0b\u82cf\u79d1\u7248\u65f6\u4ee3\u6570\u5b66\u62a5\u7b54\u6848yyhyjh
\u8bbe\u4ec5\u5f00\u4e00\u4e2a\u653e\u6c34\u7ba1\u6bcf\u5206\u949f\u51fa\u6c34\u4e3aX\uff0c\u52192X=\uff0818-17\uff09\uff0cX=0.5
\u8bbe\u4e24\u4e2a\u653e\u6c34\u7ba1\u540c\u65f6\u5f00\u51fa\u6c34\u4e3aY\uff0c\u5219\uff0812-2\uff09*Y*2=17-8\uff0c\u5219Y=0.45
\uff081\uff09\u95ee\u7b54\u6848\uff1aY=0.45
(2)\u6bcf\u4e2a\u540c\u5b66\u80fd\u63a5\u5230\u6c34=\uff0818-17\uff09/4=0.25\uff0c\u521922\u4e2a\u540c\u5b66\u63a5\u523022*0.25=5.5
\u6240\u4ee5\u603b\u65f6\u95f4=2+\uff085.5-18-17\uff09/0.45*2=7
\uff083\uff0910\u5206\u949f\u80fd\u63a5\u6c340.5*2+\uff0810-2\uff09*0.45*2=8.2
\u80fd\u63a5\u5b8c\u6c34\u540c\u5b66\u4e2a\u6570=8.2/0.25=32.8\uff0c\u6240\u4ee5\u7b54\u6848\u662f32\u4e2a\u540c\u5b66\u80fd\u53ca\u65f6\u63a5\u5b8c\u6c34
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绛旓細?pwd=3mf2 鎻愬彇鐮: 3mf2 瀛﹁屾澛2019鍏冩棪路鍒濅腑缁煎悎鑳藉姏璇婃柇路鍚勫勾绾ц瘯鍗1鐗坾2019鍏冩棪路涓冨勾绾х患璇婅瘯鍗穦2019鍏冩棪路涔濆勾绾х患璇婅瘯鍗穦2019鍏冩棪路鍏勾绾х患璇婅瘯鍗穦2019.鍒濅腑缁煎悎鑳藉姏鑳藉姏璇婃柇.鍏勾绾ц嫳璇.绛旈鍗.缁堢増.pdf|2019.鍒濅腑鍏冩棪缁煎悎鑳藉姏璇婃柇.鍏勾绾ф暟瀛.璇曞嵎.缁堢増.pdf|2019.鍒濅腑鍏冩棪缁煎悎鑳藉姏璇婃柇....
绛旓細1/(1+2)+1/(2+3)+1/(3+4)+...+1/(99+100)=(1-1/2)+(1/2-1/3)+(1/3-1/4)+...+(1/99-1/100)=1-1/2+1/2-1/3+1/3-1/4+...+1/99-1/100 =1-1/100 =99/100
