题目内容
a的相反数是
;b的绝对值是
;c的平方是
;且b>c,则a+b+c=______.
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∵a的相反数是
;b的绝对值是
;c的平方是
,
∴a=-
,b=±
,c=±
,
又∵b>c,
∴a=-
,b=
,c=-
或a=-
,b=-
,c=-
.
∴当a=-
,b=
,c=-
时,a+b+c=-
+
-
=-
.
当a=-
,b=-
,c=-
,a+b+c=-
-
-
=-
.
故答案是:-
或-
.
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∴a=-
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又∵b>c,
∴a=-
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∴当a=-
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当a=-
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故答案是:-
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若a的相反数是-
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| B、-2 | ||
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|