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若(ax-1)5的展开式中x3的系数是80,则实数a的值是A.-2B.C.D.2
试题详情
若(ax-1)
5的展开式中x
3的系数是80,则实数a的值是( )
A.-2
B.
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)
C.
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)
D.2
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若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABYAAAASCAYAAABfJS4tAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAXCAYAAADtNKTnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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)
D.2
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若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
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)
D.2
-
若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABYAAAASCAYAAABfJS4tAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAOtJREFU
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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAXCAYAAADtNKTnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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D.2
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若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
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)
D.2
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若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
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jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAOtJREFU
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D.2
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若(ax-1)5的展开式中x3的系数是80,则实数a的值是( )
A.-2
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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAXCAYAAADtNKTnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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)
D.2
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(1-ax)2(1+x)6的展开式中,x3项的系数为-16,则实数a的值为( )
A.2
B.3
C.-2
D.2或3
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已知(ax+1)n的展开式中,二项式系数和为32,各项系数和为243,则a等于( )
A.-2
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C.-3
D.3
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