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初中数学 求证2019^2+2019^2×2020^2+2020^2是完全平方数
中考数学重点难点、竞赛真题解析
初中数学中考竞赛经典例题——代数部分291/465
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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&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=2024111007563167D006775D7B2D843A9A&requestFrom=704&version_code=80402&x-expires=1762732592&x-signature=%2FL3MLqzvnaGS5yYisWbcBBzfQs4%3D)
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