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定义新运算:对于任意不为零的实数a、b,都有a★b=﹣,求方程x★(2﹣x)=的解.
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教案备课库《2017年河北省廊坊市广阳区中考数学二模试卷》真题及答案
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1定义新运算对于任意实数ab都有a⊕b=aa-b+1等式右边是通常的加法减法及乘法运算比如数字2和5
定义新运算对于任意实数ab都有a⊕b=aa﹣b+1等式右边是通常的加法减法及乘法运算.比如2⊕5=
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如果我们用♀♂来定义新运算对于任意实数ab都有a♀b=aa♂b=b例如3♀2=33♂2=2则勐♀捧♀
对于任意实数abcd定义有序实数对ab与cd之间的运算△为ab△cd=ac+bdad+bc如果对于任
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定义新运算对于任意实数ab都有a⊗b=aa﹣b+1等式右边是通常的加法减法及乘法运算.比如2⊗5=2
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用☆定义新运算对于任意实数ab都有a☆b=b2+1.例如1☆4=42+1=17.则m☆m☆2=
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﹣2或﹣5
定义新运算对于任意实数ab都有a⊕b=aa﹣b+1等式右边是通常的加法减法及乘法运算比如2⊕5=2×
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定义新运算对于任意实数ab都有a⊕b=aa﹣b+1等式右边是通常的加法减法及乘法运算比如2⊕5=2×
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