数学题快开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开当a=-1时,代数式-5×a的n次方-a的n次方+8×a的n次方+(-3a的n次方)-a的n+1次方(n为整数)等于A.-2 B.-2或0 C.0 D.1或-1

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数学题快开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开当a=-1时,代数式-5×a的n次方-a的n次方+8×a的n次方+(-3a的n次方)-a的n+1次方(n为整数)等于A.-2 B.-2或0 C.0 D.1或-1

数学题快开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开当a=-1时,代数式-5×a的n次方-a的n次方+8×a的n次方+(-3a的n次方)-a的n+1次方(n为整数)等于A.-2 B.-2或0 C.0 D.1或-1
数学题快开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开
当a=-1时,代数式-5×a的n次方-a的n次方+8×a的n次方+(-3a的n次方)-a的n+1次方(n为整数)等于A.-2 B.-2或0 C.0 D.1或-1 请简单写过程和理由,要100%正确!否则后果不堪设想

数学题快开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开开当a=-1时,代数式-5×a的n次方-a的n次方+8×a的n次方+(-3a的n次方)-a的n+1次方(n为整数)等于A.-2 B.-2或0 C.0 D.1或-1
a的n次方×(-5-1+8-3)-a的n+1次方=-a的n次方-a的n+1次方=-a的n次方×(1+a)=0

提公因式A的N次方 乘以(-5-1+8-3) - a的 (N+1)次方 当A= -1时候, 答案就是 B

之前的D 打错了