数学物理方法习题总稿-csy - 图文

(1)ze,在z?0的领域内; (2)

2

1z

1,在z?1的领域内; 2z(z?1)11(3),分别在z?0和z?1的领域内;(4)e1?z,在1?|z|??内;

z(z?1) 一4 一 (5)

1(z?1)(z?2)i,在以为中心的各圆环域内;(6),在5?|z|??内; 2(z?3)(z?4)z(z?i)11?cosz1?|z|?22?|z|??,分别在和内;(8),在z?0的领域内;

z2?3z?2z1(9)sin,在z?0的领域内; (10)ctgz,在z?0的领域内;

z(7)(11)

1,分别在|z|?2,2?|z|?3和3?|z|??内;

(z?2)(z?3)(12)

z,分别在|z|?1,1?|z|?2和2?|z|??内;

(z?1)(z?2)1,分别在|z|?1,1?|z|?2和2?|z|??内; 2(z?1)(z?2)1z2(z2?1)2,分别在0?|z|?1和1?|z|??内;

(13)

(14)

5、将上题的函数在z??的领域内展成罗朗级数。

习题八

1、 判断下列奇点(包括z??点)的性质。如果是极点,确定其阶数:

1cosz (为实数); (2) az2?a2z2cosaz?coabzsinza,b(3)(为常数); (4); 22zzsinz111?; (5)2?; (6)zzze?1z12(7)sin; (8)secz。

z(1)

2、设z?b点分别为函数f(z)和g(z)的m阶和n阶极点,问z?b分别为下列函数的何种性质的点?

(1)f(z)g(z); (2)

f(z); (3)f(z)?g(z). g(z)3、确定下列函数的奇点(包括z??点),求出函数在各奇点上的留数:

exz; (1); (2)

(z?1)(z?2)21?zezzez(3)2 (a为实常数); (4)(a为实常数);

23z?a(5)1z3?z5;

1(7)e1?z; (9)

11?z2n; (11)1?e2zz4; 4、求下列复函的积分:

(1)??lnz|z|?1z3dz; (3)

??z|z|?21dz; 2?sin2z(4)??1c(z2?1)(z?1)2dz

(z?a) (6)z2 (z2?1)2; 一5 一 (8)z2n(z?1)n; (10)1(ez?1)2; (12)znsin1z. 1 (2)??|z|?2ez2dz;

c为圆x2?y2?2x?2y?0) (习题九

1、 计算下列实函定积分: (1)I??2?01dx(1??cosx)2cosxdx21?2?cosx??2n(0???1);(2)I??2???2?sin2x0dx(??0);

(3)I???2??0(|?|?1);(4)I??202?1dx; 21?cosxcos22xdx1?2?cosx??21dx1?asinx?(5)I?20cosxdx; (6)I??0(|?|?1);

(7)I??2?0sin2xdxa?bcosx(a?b?0); (8)I??2?0(|a|?1).

2、计算下列广义积分的积分主值: (1)I???????x2?1x2dx; (2)I??dx; 42220x?1(x?9)(x?4)(3)I??01dx42x?a(a?0); (4)I???0x2?1dx; 6x?1(a?0,b?0);

(5)I???0x2dx222(x?a)(a?0);(6)I??(m?n).

1dx??(x2?a2)(x2?b2)?x2mdx(7)I????1?x2n?3、计算下列实函数定积分(混合型); (1)I???0cosmxdx1?x4(m?0);(2)I???0cosmxdx(x2?a2)2(m?0,a?0);

一6 一 (3)I?????0cosxdx2222(x?a)(x?b)sinmxdxx(x2?a2)2(a?0,b?0);

(4)I??0(m?0,a?0);

(5)I??0?xsinxsin2xdx; (6)I??dx;

??(1?x2)2x2xsinmx???2x2?a2dx(m?0,a?0); ??xsinxxcosxdx,I?(8)I1??2???x2?4x?20dx ??x2?4x?20(7)I??4?sinxsin3xdx. dx; (10)I??(9)I??43????xx?

习题十

1、 求下列原函数的像函数:

(1)sint和cos2t; (2)e(3)sh?t和ch?t; (4)2??tsin?t和e??tcos?t;

1?t;

(5)sin(t?2); sin(t?2)H(t?2). 2、求下列常微分方程的初值问题:

?y'''(t)?3y''(t)?3y'(t)?y(t)?6e?t,(1)? '''y(0)?0,y(0)?0,y(0)?0;??y''(t)?9y(t)?30cht, ?'y(0)?3,y(0)?0;?'2t?y(t)?2y(t)?2z(t)?10e,'''2t?y(t)?2y(t)?y(t)?te,?'2tz(t)?2y(t)?z(t)?7e, (3)? (4)?'y(0)?0,y(0)?0;??y(0)?1,z(0)?3;??''n2?2a2''22?T(t)??aT(t)?g,T(t)?Asin?t,?T(t)?2(5)? (6) l?''?T(0)?3,T(0)?0(g为常数);?T(0)?0,T(0)?0;??T''(t)??2a2T(t)?g(t),?T''(t)??2a2T(t)?g(t),(7)? (8) ? 'T(0)?0;??T(0)?T(0)?0.3、电动势为E的直流电流源通过电阻R对电容C充电,求充电电流i(t).

4、电动势为E的直流电流源通过电感L和电阻R对电容C充电,求充电电流i(t). 5、求解RC交流电路,其方程为:

1t?i(t)R?i(t)dt?E0sin?t,??0 c??i(0)?0.? 一7一

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