求方程x2+6xy-7y2=2009的正整数解．-数学

更多内容推荐

• 三兄弟带着西瓜到农贸市场去卖：老大带了10个，老二带了16个，老三带了26个．上午他们按同一价格卖了若干个西瓜（西瓜按个数出售），过了中午，怕西瓜卖不完，他们跌价把所有的西-数学
• It is believed ______ children should learn to be responsible from the very beginning．A．whyB．howC．wh
• ________ the meeting himself gave them a great deal of encouragement.A．The president will attendB．Th
• It is uncertain side effect the medicine will bring about, although about two thousand patients have
• ________ is known to us all is that the 2016 Olympic Games will take place in Rio de Janeiro.A．ItB．
• ________ has been mentioned above，continued chairman after he took a sip of coffee，________ the proj
• It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere
• It’s still not clear＿＿＿＿＿the two countries can reach an agreement at the conference．A．whatB．whichC．w
• I made a promise to myself ________ this year，my first year in high school，would be different.(2012
• 二元二次方程组的解是[]A.B.C.D.-九年级数学
• 已知x＞y＞z＞1，那么适合等式xyz+xy+yz+zx+x+y+z=2003的整数解为______．-数学
• 方程1x+1y-1xy2=34的整数解（x，y）=______．-数学
• 已知三个实数x1，x2，x3，它们中任何一个数加其余两个数的积的5倍总等于6，这样的三元数组（x1，x2，x3），共有（）A．2组B．3组C．4组D．5组-数学
• 根吸收水分和无机盐的最主要的部位是[]A．根冠B．分生区C．伸长区D．成熟区-七年级生物
• ________ the football match will be played depends on the weather.A．IfB．WhetherC．ThatD．Where-高三英语
• It makes little difference to me ________we go or stay.A．whetherB．whereC．thatD．how-高三英语
• ______ we do must be in the interests of the people.A．WhateverB．HoweverC．No matter whatD．No matter h
• (2011·重庆)It is still under discussion ________ the old bus station should be replaced with a modern
• k取什么值时，方程组有一个实数解？并求出这时方程组的解。-九年级数学
• —What do you think was the highlight of your school life?—_______.A．When I had won championship in t
• 方程5x2-xy-6=0的整数解为______．-数学
• 满足x＞y＞0且x3+7y=y3+7x的整数x=______，整数y=______．-数学
• 不定方程2（x+y）=xy+7的所有整数解为______．-数学
• 设x、y都是正整数，则方程x2-y2=2001的解的个数是______．-数学
• 方程组的解是（）。-九年级数学
• ________ caused the accident is still a complete mystery.A．WhatB．That C．HowD．Where-高三英语
• It suddenly occurred to him________he had left his keys in the office. (2012·江西，25)A．whetherB．whereC
• The limits of a person's intelligence，generally speaking，are fixed at birth，but ________ he re
• 根尖由四个部分组成，从底端向上依次分别是________，________，________，________。根生长速度最快的部位是________。根的生长靠________区增加细胞的数量和__
• 下列结构中，使根不断长长的是[]A．根冠和生长点B．伸长区和成熟区C．分生区和伸长区D．根冠和伸长区-七年级生物
• You fix my what? It was to get my brakes repaired ____ I brought my car in, not to get the engine re
• It doesn’t matter________you turn right or left at the crossing—both roads lead to the park. (2012·天
• . It is none of your business ______ other people think about you. Believe in yourself.A．howB．whatC．
• 已知a、b、c都是整数，且对一切实数x，（x-a）（x-2002）-2=（x-b）（x-c）都成立，则这样的有序数组（a，b，c）共有______组．-数学
• 高一某班在入学体检中，测得全班同学平均体重是48千克，其中男同学平均体重比女同学平均体重多20％，而女同学人数比男同学人数多20％，求男、女同学的平均体重各是多少？-九年级数学
• It doesn't matter ________ you pay by cash or credit card in this store.(2012·山东 )A．howB．whethe
• Before the problem can be solved，it must be obvious ________ the problem itself is.(2011·湖南，31)A．wh
• It is by no means clear ________ the president can do to end the strike.(2012·新课标全国)A．howB．whichC．t
• _______ you go, _______ you should keep in mind is that you are a Chinese.A．Wherever, what B．whereve
• 方程组y2=x2+2x+1x2=y2+2y+1共有几组解（）A．1B．2C．3D．4-数学
• The limits of a person’s intelligence，generally speaking，are fixed at birth，but________he reaches th
• ______in the regulation is that you should not tell other people the password of your e-mail account
• It’s none of your business _______other people think about you. Believe yourself. A．howB．whatC．which
• ________ Barbara Jones offers to her fans is honesty and happiness.A．WhichB．WhatC．ThatD．Whom-高三英语
• 解方程组：-九年级数学
• The tour pal lost his way in the mountain; ________ made things worse was that it began to rain.A．th
• 不定方程x2-2y2=5的正整数解（x，y）的组数是（）A．0组B．2组C．4组D．无穷多组-数学
• _____ Barbara Jones offers to her fans is honesty and happiness.A．WhichB．WhatC．ThatD．Whom-高二英语
• ______ anyone should want to kill her was unbelievable.A．WhetherB．ThatC．WhatD．If-高一英语
• Everyone in the village is very friendly. It doesn’t matter ___ you have lived there for a short or