可以用文字表达.

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可以用文字表达.
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可以用文字表达.
可以用文字表达.

可以用文字表达.
直接代入式中不就行了
2 根号5 根号5 
[根号(4a^2+1)]/a
根号(4+x0^2)
根号(4+(x+h)^2)

看不见的

直接把()内的数带入X就行了 带着根号就是答案

yhgtruyhgvghfrtyopkjpi908988r98erjdcixuenhciooiihdhsouwe098jrfieofjmcreaw08ruf08rw4ufjgtkrdjxvchxcd5rui80u4rfoijkm438r4u8fur8ewfGWMIU2noli42jiuouer4hGHGBGFTGGGTEJWHJUHWNUEBDHBDBNFKKHJEQUOIRNDLJQHFE8UW...

全部展开

yhgtruyhgvghfrtyopkjpi908988r98erjdcixuenhciooiihdhsouwe098jrfieofjmcreaw08ruf08rw4ufjgtkrdjxvchxcd5rui80u4rfoijkm438r4u8fur8ewfGWMIU2noli42jiuouer4hGHGBGFTGGGTEJWHJUHWNUEBDHBDBNFKKHJEQUOIRNDLJQHFE8UWHrfkjbhufoweOFHEOWU8RFJDQ3OUJHFIOEJHft t4kj42olitj4e2w/kcDOIGFT5JGVHA/QTELLLLLLLOIYHRAE43WIO840Q2w9tjuwovad;vjga4wo;Lugjnoiregjh5ol/;gjvaoiejy4wjgvolaujmgujhga;eplojhg;oalhjgalmjohu8DC VVIHTJDDGAFRDHTHNE CVLOITAEHGLCMOTGH9a84e3ht;fuoi9t4y7974654hgueyt7rhuirh894w76r783yr984y89rfwehfu7dy7fywu4ryewyf8y34yUEWR984UJFOKJSihcwqiRHOJWJCIpQjhfieqjug80ru8ghf2niohuog8wht

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