>> clear;
>> w=2*pi*800;
>> ZC1=1/(1i*w*220e-9);
>> ZC2=1/(1i*w*180e-9);
>> ZR=82;
>> Z2=ZC2*ZR/(ZC2+ZR);
>> ZZ=Z2+ZC1;
>> ZZ

ZZ =

   8.1551e+01 - 9.1034e+02i

>> 24/ZZ;
>> 24/ZZ*1000;
>> (8/4+13/5+11/3)/(1/22+1/4+1/5+1/3)

ans =

    9.9744

>> z2=-120+321i;
>> angle(z2)

ans =

    1.9285

>> w=50*2*pi;
>> ZR=50;ZL=1i*w*0.5;ZC=1/(1i*w*50e-6);
>> clear;
>> w=50*2*pi;
>> ZR=50;ZL=1i*w*0.5;ZC=1/(1i*w*50e-6);
>> ZZ=ZR+ZL+ZC;
>> 230/ZZ

ans =

   1.0243 - 1.9138i

>> II=ans;
>> IIm=II*sqrt(2);
>> abs(IIm);
>> abs(IIm)

ans =

    3.0698

>> angle(IIm)

ans =

   -1.0794

>> abs(IIm)

5. týden

>> w=2*pi*50;
>> Z1=15+1i*w*0.88

Z1 =

   1.5000e+01 + 2.7646e+02i

>> ZC=1/(1i*w*24e-6)

ZC =

   0.0000e+00 - 1.3263e+02i

>> ZZ=Z1*ZC/(Z1+ZC)

ZZ =

   1.2617e+01 - 2.5361e+02i

>> clear
>> w=2*pi*50;
>> Z2=14+71+1i*w*2.11;
>> ZC1=1/(1i*w*31e-6)

ZC1 =

   0.0000e+00 - 1.0268e+02i

>> Z2

Z2 =

   8.5000e+01 + 6.6288e+02i

>> Z1=ZC1*Z
Undefined function or variable 'Z'.
 
>> Z1=ZC1*Z2/(ZC1+Z2)

Z1 =

   2.7915e+00 - 1.2108e+02i

>> ZC2=1/(1i*w*12e-6)

ZC2 =

   0.0000e+00 - 2.6526e+02i

>> ZZ=ZC2+Z1;
>> ZZ=ZC2+Z1

ZZ =

   2.7915e+00 - 3.8634e+02i

>> clear
>> Z1=-4.81+11.3i;
>> abs(Z1)

ans =

   12.2811

>> angle(Z1)

ans =

    1.9732

>> 15*exp(-2.31i)

ans =

 -10.1055 -11.0851i

>> Z=12.62-253.6i;
>> U=230;
>> II=U/Z

II =

   0.0450 + 0.9047i

>> SS=U*conj(II)

SS =

   1.0355e+01 - 2.0808e+02i

>> abs(SS)

ans =

  208.3384

>> clear
>> UUR=230*exp(0i)

UUR =

   230

>> UUS=230*exp(-2*pi*1i/3)

UUS =

  -1.1500e+02 - 1.9919e+02i

>> UUT=230*exp(2*pi*1i/3)

UUT =

  -1.1500e+02 + 1.9919e+02i

>> 
>> UURS=UUR-UUS

UURS =

   3.4500e+02 + 1.9919e+02i

>> abs(UURS)

ans =

  398.3717

>> ZZR=200;ZZS=300;ZZT=400;
>> IIN=UUR/ZZR+UUS/ZZS+UUT/ZZT

IIN =

   0.4792 - 0.1660i

>> w=2*pi*50;
>> ZZR=1/(1i*w*28e-6);
>> ZZS=82;
>> ZZT=13+1i*w*0.88;
>> IIN=UUR/ZZR+UUS/ZZS+UUT/ZZT

IIN =

  -0.7031 + 0.0430i

>> abs(IIN)

ans =

    0.7044

>> angle(IIN)

ans =

    3.0806