x-7=±11
根号下x-2>=0
x>=2
所以x=18或4
y+1=-0.4
y=-1.4
y没有平方根,
所以无解
已知实x,y满足(x-7)²=121,(y+1)³=-0.064,求式子x-2平方根-x+10y平方根+245y立方根的值
已知实x,y满足(x-7)²=121,(y+1)³=-0.064,求式子x-2平方根-x+10y平方根+245y立方根的值
数学人气:120 ℃时间:2019-10-18 02:53:48
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