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数学实验必做题3选做1.docVIP

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数学实验必做题3选做1.doc

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; for n=2005:2050 y=a*x+b;x=c*y+d; fprintf(%g,%8.6f,%8.6f\n,n,eval(y),eval(x)); fprintf(%g,%8.6f,%8.6f\n,n,eval(y),eval(x)); end 2005,8.000000,40.500000 2005,8.000000,40.500000 2006,8.500000,41.250000 2006,8.500000,41.250000 2007,8.250000,40.875000 2007,8.250000,40.875000 2008,8.375000,41.062500 2008,8.375000,41.062500 2009,8.312500,40.968750 2009,8.312500,40.968750 2010,8.343750,41.015625 2010,8.343750,41.015625 2011,8.328125,40.992188 2011,8.328125,40.992188 2012,8.335938,41.003906 2012,8.335938,41.003906 2013,8.332031,40.998047 2013,8.332031,40.998047 2014,8.333984,41.000977 2014,8.333984,41.000977 2015,8.333008,40.999512 2015,8.333008,40.999512 2016,8.333496,41.000244 2016,8.333496,41.000244 2017,8.333252,40.999878 2017,8.333252,40.999878 2018,8.333374,41.000061 2018,8.333374,41.000061 2019,8.333313,40.999969 2019,8.333313,40.999969 2020,8.333344,41.000015 2020,8.333344,41.000015 2021,8.333328,40.999992 2021,8.333328,40.999992 2022,8.333336,41.000004 2022,8.333336,41.000004 2023,8.333332,40.999998 2023,8.333332,40.999998 2024,8.333334,41.000001 2024,8.333334,41.000001 2025,8.333333,41.000000 2025,8.333333,41.000000 2026,8.333333,41.000000 2026,8.333333,41.000000 2027,8.333333,41.000000 2027,8.333333,41.000000 2028,8.333333,41.000000 2028,8.333333,41.000000 2029,8.333333,41.000000 2029,8.333333,41.000000 2030,8.333333,41.000000 2030,8.333333,41.000000 2031,8.333333,41.000000 2031,8.333333,41.000000 2032,8.333333,41.000000 2032,8.333333,41.000000 2033,8.333333,41.000000 2033,8.333333,41.000000 2034,8.333333,41.000000 2

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