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外语
For all real numbers x, the operation x* is defined by the equation x*=x+4, If (x*) *=10, then x=?
For all real numbers x, the operation x* is defined by the equation x*=x+4, If (x*) *=10, then x=?
admin
2022-11-19
67
问题
For all real numbers x, the operation x
*
is defined by the equation x
*
=x+4, If (x
*
)
*
=10, then x=?
选项
A、5
B、2
C、3
D、15
E、24
答案
B
解析
x
*
=x+4,那么(x
*
)
*
=x
*
+4=(x+4)+4=x+8。已知为(x
*
)
*
=10,所以x=2,选择B。
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本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
0
GMAT QUANTITATIVE
GMAT
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