1-(a-1/(1-a))²÷(a²-a+1)/(a²-2a+1)
答案:2 悬赏:70 手机版
解决时间 2021-02-22 05:45
- 提问者网友:寂寞撕碎了回忆
- 2021-02-21 22:59
1-(a-1/(1-a))²÷(a²-a+1)/(a²-2a+1)
最佳答案
- 五星知识达人网友:往事埋风中
- 2021-02-21 23:10
1-[a-1/﹙1-a﹚]²÷﹙a²-a+1﹚/﹙a²-2a+a﹚
=1-[a﹙a-1﹚/﹙a-1﹚+1/﹙a-1﹚]²÷﹙a²-a+1﹚/﹙a-1﹚²
=1-[﹙a²-a+1﹚/﹙a-1﹚]²÷﹙a²-a+1﹚/﹙a-1﹚²
=1-﹙a²-a+1﹚²/﹙a-1﹚²·[﹙a-1﹚²/﹙a²-a+1﹚]
=1-﹙a²-a+1﹚
=-a²+a
=1-[a﹙a-1﹚/﹙a-1﹚+1/﹙a-1﹚]²÷﹙a²-a+1﹚/﹙a-1﹚²
=1-[﹙a²-a+1﹚/﹙a-1﹚]²÷﹙a²-a+1﹚/﹙a-1﹚²
=1-﹙a²-a+1﹚²/﹙a-1﹚²·[﹙a-1﹚²/﹙a²-a+1﹚]
=1-﹙a²-a+1﹚
=-a²+a
全部回答
- 1楼网友:青尢
- 2021-02-21 23:36
1-(a-1/1-a)÷(a²-2a+1分之a²-a+1)
=1-(-1)÷ (a²-a+1)/(a²-2a+1)
=1+(a²-2a+1)/(a²-a+1)
=(a²-2a+1 +a²-a+1)/(a²-a+1)
=(2a²-3a+2)/(a²-a+1)
=2-a/(a²-a+1)
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