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1、必做1在MATLAB软件中做出曲面z=f(x,y)的图形。并把源程序和图形复制粘贴到答卷中。，[x,y]=meshgrid(2:0.1:6);z=(log10(x)*log10(y))/(log10(x)+log10(y));meshc(x,y,z)2、在市场经济中存在这样的循环现象：若去年的猪肉生产量供过于求，猪肉的价格就会降低；价格降低会使今年养猪者减少，使今年猪肉生产量供不应求，于是肉价上扬；价格上扬又使明年猪肉产量增加，造成新的供过于求…据统计，某城市2003年的猪肉产量为45万吨，肉价为7.00元/公斤.2004年生产猪
2、肉39万吨，肉价为9.00元/公斤.已知2005年的猪肉产量为42万吨，若维持目前的消费水平与生产模式，并假定猪肉产量与价格之间是线性关系，问若干年以后猪肉的生产量与价格是否会趋于稳定？若能够稳定，请求出稳定的生产量和价格。[a,b]=solve('7=45*a+b','9=39*a+b');[c,d]=solve('39=7*c+d','42=9*c+d');x=42;forn=2005:2050y=a*x+b;x=c*y+d;fprintf('%g,%8.6f,%8.6f',n,eval(y),eval(x));fprin
3、tf('%g,%8.6f,%8.6f',n,eval(y),eval(x));end2005,8.000000,40.5000002005,8.000000,40.5000002006,8.500000,41.2500002006,8.500000,41.2500002007,8.250000,40.8750002007,8.250000,40.8750002008,8.375000,41.0625002008,8.375000,41.0625002009,8.312500,40.9687502009,8.312500,40.
4、9687502010,8.343750,41.0156252010,8.343750,41.0156252011,8.328125,40.9921882011,8.328125,40.9921882012,8.335938,41.0039062012,8.335938,41.0039062013,8.332031,40.9980472013,8.332031,40.9980472014,8.333984,41.0009772014,8.333984,41.0009772015,8.333008,40.9995122015,8.33
5、3008,40.9995122016,8.333496,41.0002442016,8.333496,41.0002442017,8.333252,40.9998782017,8.333252,40.9998782018,8.333374,41.0000612018,8.333374,41.0000612019,8.333313,40.9999692019,8.333313,40.9999692020,8.333344,41.0000152020,8.333344,41.0000152021,8.333328,40.9999922
6、021,8.333328,40.9999922022,8.333336,41.0000042022,8.333336,41.0000042023,8.333332,40.9999982023,8.333332,40.999998第15页共16页第16页共16页2024,8.333334,41.0000012024,8.333334,41.0000012025,8.333333,41.0000002025,8.333333,41.0000002026,8.333333,41.0000002026,8.333333,41.000000
7、2027,8.333333,41.0000002027,8.333333,41.0000002028,8.333333,41.0000002028,8.333333,41.0000002029,8.333333,41.0000002029,8.333333,41.0000002030,8.333333,41.0000002030,8.333333,41.0000002031,8.333333,41.0000002031,8.333333,41.0000002032,8.333333,41.0000002032,8.333333,4
8、1.0000002033,8.333333,41.0000002033,8.333333,41.0000002034,8.333333,41.0000002034,8.333333,41.0000002035,8.333333,41.0000002
