3个回答
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(x+1)²<=a²
令x+1=y
|y|<=|a|
则
(1)a>=0
-a<=y<=a
-a<=x+1<=a
-a-1<=x<=a-1
(2)a<0
a<=x+1<=-a
a-1<=x<=-a-1
令x+1=y
|y|<=|a|
则
(1)a>=0
-a<=y<=a
-a<=x+1<=a
-a-1<=x<=a-1
(2)a<0
a<=x+1<=-a
a-1<=x<=-a-1
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展开全部
原式等于
(x+1)²<=a²
若a>0
则为-a<=x+1<=a -a-1<=x<=a-1
若a=0
则, x=-1
若a<0
则为a<=x+1<=-a a-1<=x<=-a-1
(x+1)²<=a²
若a>0
则为-a<=x+1<=a -a-1<=x<=a-1
若a=0
则, x=-1
若a<0
则为a<=x+1<=-a a-1<=x<=-a-1
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