Let a be integral part of
and b be its decimal part.Let c be the integral part of π and d be the decimal part. if ad-bc=m,then( )
(英汉词典:integralpart整数部分;decimalpart小数部分)
| 2 |
(英汉词典:integralpart整数部分;decimalpart小数部分)
| A、-2<m<-1 |
| B、-1<m<0 |
| C、0<m<1 |
| D、1<m<2 |
已知m,n是实数,且满足m2+2n2+m-
n+
=0,则-mn2的平方根是( )
| 4 |
| 3 |
| 17 |
| 36 |
A、
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B、±
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C、
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D、±
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