先将代数式(x-xx+1)÷(1+1x2-1)化简，再从选取一个你喜欢的整数x代入求值．-数学

更多内容推荐

• 先化简，再求值：（x2+x-1x-1-1）÷xx2-1，其中x=2（结果保留根号）．-数学
• 化简，求值：m2-2m+1m2-1÷(m-1-m-1m+1)，其中m=3．-数学
• This year, Chinese readers are especially excited with the Nobel Literature Prize, for the first tim
• South Korean star PSY's “Gangnam style” video,________, has set the Guinness World Record for t
• It is hoped that this project _____ by the end of 2014 will be a popular tourist attraction of the c
• The airport ______ next year will help promote tourism in this area.A．having been completedB．complet
• Pressed from his parents, and _____ that he has wasted too much time, the boy is determined to stop
• A new virus related to SARS is reported______ at least one person in China last week.A．to kill B．to
• 先化简，再求值：，其中x=-1。-八年级数学
• 先化简2xx2-1÷(1-1x+1)，再代入一个你喜欢且使原式有意义的数求值．-数学
• 求值x-1x÷(x-1x)，其中x=2-1．-数学
• 计算：(2aa-1-aa+1)•a2-1a-数学
• 化简求值：当x=时，=（）。-八年级数学
• 化简，结果是[]A．B．C．D．-八年级数学
• 化简：=（）．-八年级数学
• 化简：（a2-4a2-4a+4+2-aa+2）÷aa-2，并选一个你喜欢的a的值代入使结果为整数．-数学
• ____ to complete the job on time, they set out to work immediately.A．Being determinedB．On having det
• Mr. Black decided to give up his farm and devoted all his time to_______those children living on the
• ____ late in the morning, Bob turned off the alarm.A．To sleepB．SleepingC．SleepD．Having slept-高二英语
• ___________ so delicious, the soup is very popular with the kids.A．TastedB．TastingC．To tasteD．Taste-
• 已知a-b=5，ab=-2，则1a-1b=______．-数学
• The well-known singer insisted on ______ his private affairs in the press conference.A．not to discus
• I think it a great honor ___________ to visit your country.A．to inviteB．invitingC．having invited D．t
• The new building _____ at the end of this year _____ to that university.A. be completed; belongs B b
• 当x=cot60°时，代数式x2-3xx-2÷(x+32-x)的值是（）A．3-12B．3+12C．3-13D．3+13-数学
• ______ cold, he covered his blanket, ______ only his arms ______.A．Felt, left, uncoveredB．Feeling, l
• ______ which school was suitable for their son, the parents visited lots of different primary school
• 先化简，再求值：2-xx2+x÷x2-3xx2+2x+1•9-x24-2x，其中x=-2．-数学
• （1）；（2）化简：．-八年级数学
• _______ to the sunlight for too long will do harm to your skin.A．ExposingB．ExposedC．Being exposedD．H
• The railway station was overflowing with people _______ back home for the Spring Festival.A．to headB
• 先化简，再求值：(3xx-1-xx+1)•x2-1x，其中x=3．-数学
• People drank a kind of tea _________ from leaves _________ a special chemical to reduce body pains a
• Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.A．foundB．found
• Jim was ashamed of himself for _______ rude words to the beggar in the street the week before.A．havi
• ____ through Africa, the infectious disease jumping from children to adults killed 1,000 people.A．Sw
• （1）计算18+1550-612-2sin45°+13tan260°（2）先化简，再求值：(1x-y-1x+y)÷2yx2-2xy+y2，其中x=1+2，y=1-2．-数学
• 计算（1）a+2a2-2a•a2-4a+4a+2（2）(2xx-2-xx+2)÷xx2-4．-数学
• It was freezing last night, so they had the fire___ all night long.A．to burnB．burnedC．burnD．burning
• We are looking forward to ______ the problem of the traffic accident______.A．see; solvingB．see; to s
• 化简（1）a+ba-b+ab-a（2）(2yy-3-yy+3)•y2-9y．-数学
• 先化简，再求值：(3xx+2-xx-2)÷2xx2-4，其中x=4-5．-数学
• 先化简，再选择使原式有意义而你喜欢的数代入求值：2x+6x2-4x+4•x-2x2+3x-1x-2．-数学
• It was all your own fault, so you can’t avoid ____ for it. A．to be punishedB．to punishC．being punish
• That was a terrible night . The rain was pouring down, _________ thunder and lightning.A．being accom
• 先化简，再求值：（a-1+2a+1）÷（a2+1），其中a=2-1．-数学
• The supermarket next month will be the biggest one in the city.A．completedB．being completedC．to be c
• After hearing the bad news, Susan found herselfof it from time to time while at work.A．to thinkB．thi
• The elderly mother sits in the armchair,at the family picture on the wall quietly.A．staringB．being s
• 计算：(a-1+4aa-1)(1+a-4aa+1)．-数学