D:\j_Iam_TEMP\_jh\_jh_ex2b_3a_test.wxmx
(%i1) kill(all);

\[\]\[\tag{%o0} \ensuremath{\mathrm{done}}\]

(%i4) B:3;H:2;Hmn:1;ya:9800;

\[\]\[\tag{%o1} 3\]

\[\]\[\tag{%o2} 2\]

\[\]\[\tag{%o3} 1\]

\[\]\[\tag{%o4} 9800\]

(%i5) Fx(h):=sqrt(h);

\[\]\[\tag{%o5} \mathop{Fx}(h)\mathop{:=}\sqrt{h}\]

(%i7) S:integrate(Fx(h),h);mS:integrate(Fx(h)·(Fx(h)/2),h);

\[\]\[\tag{%o6} \frac{2 {{h}^{\frac{3}{2}}}}{3}\]

\[\]\[\tag{%o7} \frac{{{h}^{2}}}{4}\]

(%i8) S(h):=((2·h^(3/2))/3);

\[\]\[\tag{%o8} \mathop{S}(h)\mathop{:=}\frac{2 {{h}^{\frac{3}{2}}}}{3}\]

(%i9) x_C(h):=(h^2/4)/((2·h^(3/2))/3);

\[\]\[\tag{%o9} \mathop{x\_ C}(h)\mathop{:=}\frac{\frac{{{h}^{2}}}{4}}{\frac{2 {{h}^{\frac{3}{2}}}}{3}}\]

https://maxima.sourceforge.io/ru/maxima-tarnavsky-3.html
(%i10) rat((h^2/4)/((2·h^(3/2))/3));

\[\]\[\tag{%o10)/R} \frac{3 \sqrt{h}}{8}\]

(%i11) x_C_t(h):=(3·sqrt(h))/8;

\[\]\[\tag{%o11} \mathop{x\_ C\_ t}(h)\mathop{:=}\frac{3 \sqrt{h}}{8}\]

(%i13) x_C_1:x_C_t(1),numer;x_C(2),numer;

\[\]\[\tag{%o12} 0.375\]

\[\]\[\tag{%o13} 0.5303300858899105\]

(%i14) P1:S(1)·B·ya;

\[\]\[\tag{%o14} 19600\]

(%i15) P2:1·1·B·ya;

\[\]\[\tag{%o15} 29400\]

(%i16) P:P1+P2;

\[\]\[\tag{%o16} 49000\]

(%i17) x:(x_C_1·P1+0.5·P2)/(P);

\[\]\[\tag{%o17} 0.45\]

(%i20) x_C_test:%;x_C_test;

\[\]\[\tag{%o19} 0.45\]

\[\]\[\tag{%o20} 0.45\]

P-z OK!
(%i23) h_C_:HHmn/2;P:ya·h_C_·B·Hmn;

\[\]\[\tag{%o22} \frac{3}{2}\]

\[\]\[\tag{%o23} 44100\]

(%i25) I:(Hmn··3·B)/12,numer;

\[\]\[\tag{%o25} 0.25\]

(%i28) h_D_test:h_C_+(I)/(h_C_·Hmn·B);Hh_D_test;

\[\]\[\tag{%o27} 1.5555555555555556\]

\[\]\[\tag{%o28} 0.4444444444444444\]

P_x; h_D - OK!

Created with wxMaxima.

The source of this Maxima session can be downloaded here.