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1求fx4x6xx395在(0,100)上最大值、最小值,根。(使用函数fmi
b
d、roots)xyfmi
b
d4x6xx3950100x04432
y953258xyfmi
b
d4x6xx3950100x999999
y40000e012a40010195rootsaa
s168600852514852i0852514852i170500843114514i0843114514i
2求解常微分方程x’’x’x1,x’01,x00(使用函数dsolve)dsolveD2xDxx1Dx01x00a
s
f512expt5122

12512

310

512512

310expt5122121
3已知ta
2b
,测得对应数据如下:(多项式插值i
terp1)t0204060801001201401601835
0115320452800346640684621513556196152t00204060801001201401601835
00115320452800346640684621513556196152
000016152ti
terp1
0t0
spli
eppolyfit
t2p
00000
00144
00631
试求a和b的值。
4请用梯形法、辛普森法分别计算积分值fi
li
esqrtx2x1xquadf01a
s13369x00011ysqrtx2x1trapzxya
s133695计算二重积分
1200
1
0
x2x1dx(trapz、quad)
x
2
y2xy2xy1dxdy(使用函数dblquad)
dblquadx2y2xy2xy10102a
s103333
6矩阵M126427893,QR分解,求M的LU分解,对角阵,特征值分解。
f(使用函数lu、qr、shol、eig)M126427893luMa
s800000500001250qrMa
s900002500003500300005500075500
900000500010000DXeigMD041110548407282X14294400
911112447004719
644442336068566
077190623701229
049920391407730
0157120
0067232
7a3A4ba2Bb21caA2BCaB2c,求C。(使用函数solve)symsabcABCeq1a3eq2A4eq3ba2eq4Bb21eq5caA2Beq6CaB2cxsolveeq1eq2eq3eq4eq5eq6
fxCa
s223
8用两种方法求解Axb的解。b为四阶向量,(A为四阶随机矩阵,自己创建)。方法一:Ara
d4A093550057901389091690352902028041030813201987089360009906038B1234xi
vABx02035238005704209564方法二:A5BrrefAa
s002035023800057042100000956419.fxx3x082x12535x,用两种方法求函数的根,并求其x极值与零点。solvex3x452x5435x5xxdoublea
s方法1:fori1le
gthxxxiisrealxie
dxxxxx24156方法2:fzerox3x082x12535x1x3a
s24156求极值:10000000010000000010000002722019880015307468
fsymsxyyx3x082x12535x1xdydxdiffysolvedydxxdoublea
sfor
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