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初中数学 快速计算198^2等于多少 学霸口算就能作答 只需要10秒
初中数学，快速计算198的平方，掌握公式可口算
初中数学中考竞赛经典例题——代数部分281/465
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App01:56![初中数学 中考必会 若[3^(𝑥+1)]^2−3^(2𝑥+1)=162,求𝑥=?](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/df0bffabc41f407c8b0b291c60904daf~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250110020552903715EC67BF5A372CFD&requestFrom=704&version_code=80402&x-expires=1767981953&x-signature=1uRcvLr1VyVwykNFqxGLaf16t3I%3D)
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