求教GRE数学:twice the square of x equals 5 more than the product of 3 and x 问:比较x和1的大小
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求教GRE数学:twicethesquareofxequals5morethantheproductof3andx问:比较x和1的大小求教GRE数学:twicethesquareofxequals5m
求教GRE数学:twice the square of x equals 5 more than the product of 3 and x 问:比较x和1的大小
求教GRE数学:twice the square of x equals 5 more than the product of 3 and x 问:比较x和1的大小
求教GRE数学:twice the square of x equals 5 more than the product of 3 and x 问:比较x和1的大小
2x2=5+3x 解二次方程,(2x-5)(x+3)=0 x=5/2 or x=-3 所以答案选不确定
主要是读句子要读懂
选A,X大于1,2倍X二次方=5>3X,诚然X是大于1的
答案是不确定X一旦平方了就要考虑到正负的问题。
求教GRE数学:twice the square of x equals 5 more than the product of 3 and x 问:比较x和1的大小
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