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蛮多的地方可以看你自己喜欢mestretchest地.constantpanorama址https://abco89.com?huoy······································过点(0,1)设函数为y=ax²+bx+1又过点（2,4），（3,10）得4a+2b+1=49a+3b+1=10得a=3/2b=-3/2所以y=3/2x²-3/2x+1又...