【正文】 yyyx ， )()( yxyyx ????? ， 1???y dxdxydy ???? 7．設(shè) )(xyy? 是由方程 4ee 2 ??? xx yx 確定的隱函數(shù)，求 yd . 解：兩邊微分，得： 02 ???? x d xdyxedxedxe yyx dxxeedyxe yxy )2( ???? ， dxxe xeedyyyx 2???? 8．設(shè) 1e)cos( ??? yyx ，求 yd ． 解：兩邊對 1e)cos( ??? yyx 求導(dǎo)，得： 9 0)s in ()1( ??????? yeyyxy 0)s i n ()s i n ( ???????? yeyyxyyx )s in ()]s in ([ yxyyxe y ????? )sin( )sin( yxe yxy y ?? ??? dxyxe yxdxydy y )s in( )s in( ?? ???? 微積分初步形成性考核作業(yè)（三）解答（填空題除外） ——— 不定積分，極值應(yīng)用問題 一、填空題（每小題 2 分，共 20 分） 1． 若 )(xf 的一個(gè)原函數(shù)為 2lnx ，則 ?)(xf 2ln 2x x x c?? 。 2． 若 )(xf 的一個(gè)原函數(shù)為 xx 2e?? ，則 ?? )(xf 24 xe?? 。 證明： ??? ???? aaa a dxxfdxxfdxxf 00 )()()( 考慮積分 ??0 )(a dxxf，令 tx ?? ，則 dtdx ?? ，從而 ????? ??????????? aaaaa dxxfdttfdttfdttfdxxf 00000 )()()(])[()( 所 以 ??? ???? aaa a dxxfdxxfdxxf 00 )()()( ??? ?????? aaa dxxfxfdxxfdxxf000 )]()([)()( 16 ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tri bunal if: you don39。s 21 win. Michel Platini, president of European football39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能 遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。既然如此，何不嘗試打開心門，擁抱生活中的各種可能，讓世界感化我們呢？ Whenever we start to let our fears and seriousness get the best of us, we should take a step back and reevaluate our behavior. The items listed below are six ways you can open your heart more fully and ，我們應(yīng)該退后一步，重新反思自 己的言行。 Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through ，別再逃跑或隱藏痛苦，試著擁抱它吧； 當(dāng)悲傷來襲時(shí)，試著深呼吸，然后直面它。t really grow up, it seems is not so important。s actions. CSKA said they were surprised and disappointed by Toure39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a r esult of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you If you ar e being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。試求矩形的邊長為多少時(shí)，才能使圓柱體的體積最大。故應(yīng)選 B 2．設(shè)函數(shù) xxy sin2? ，則該函數(shù)是（ ）． A．奇函數(shù) B．偶函數(shù) C．非奇非偶函數(shù) D．既奇又偶函數(shù) 解：因?yàn)?yxxxxxy ???????? s i n)s i n ()()( 22 所以函數(shù) xxy sin2? 是奇函數(shù)。 解：由 cxdxx ??? 2332 得所求的曲線方程由 cxy ?? 2332 確定 因?yàn)榍€過 )5,4( ，所以 c??? 234325 ，解得： 31??c 因此所求的曲線方程為 3132 23 ?? xy 4．若 ????? dxxx )235(11 3 ． 解： ????? dxxx )235(11 3 442)35(101 11 1 3 ???? ??? ?? dxdxdxxx 5．由定積分的幾何意義知， xxaa d0 22? ?= 。s 150th anniversary celebrations and will attend City39?；蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過成了同一天的樣子；或許是追溯過去，對自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏。t remember his appearance. Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives。