分母有理化例:1/(根号2+根号3)=(根号2-根号3)/(2-3)=根号3-根号2则原式=根号2-1+根号3-根号2+…+根号9-根号8=3-1=2
根号用#了啊原式=1+(#2-#3/2-3 )+(#3-#4/3-4) +......+(#8+#9/8-9)=1-(#2-#3)-(#3-#4)-.........-(#8-#9)=1-#2+#3-#3+#4-#4.........-#8+#9=1-#2+#9也不知道对不对,呵呵,挺有意思!