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2*3.14*【x+1】%2*3.14*x=?急急急!

解: 这个用计算器非常好算: 3.14x1.2x1.2x2 =(3.14x2)x(1.2x1.2) =6.28x1.44 =9.0432

∫[-π/2~π/2]x^2·(sinx+1)·dx =∫[-π/2~π/2]x^2·sinx·dx +∫[-π/2~π/2]x^2·dx =0+∫[-π/2~π/2]x^2·dx =1/3·x^3 |[-π/2~π/2] =1/12·π^3 【附注】x^2·sinx是奇函数, ∴∫[-π/2~π/2]x^2·sinx·dx=0

3.14x(6/2)2x20x1/3/[3.14x(20/2)2] =3.14x9x20x1/3/[3.14X100] =3X20/100 =3/5

原题=3.14*(1+2+3+...+97+98+99+100) =3.14*【(1+100)*100/2】 =3.14*5050 =15857

用lingo算 min=2*365*x2/x1+2*3.14*x1^2*2*x2; x1

楼上哥们,不要误导人家 本来不需要循环的,干嘛弄个循环呢 clear all;clc; clear;clc;, x=[1000:100:3000]; y=100+j*(2*pi*x*0.04-1./(2*pi*x*0.0000001)); figure(1); plot(x,abs(y));grid on; figure(2); plot(x,real(y));hold on;grid on; p...

看你图上的内容,这里的x我就当成是整数来做了 #include double fun(int x) { return x * x - 3.14 * x - 6; } int main() { int x = -10; while(x

3.14*(5/2)*2*4 =3.14*(5/2*2*4) =3.14*(5*4) =3.14*20 =62.8

原式是1/3*3.14*70=1/4*3.14*【70+x】 4*70=3【70+x】 3x= 70 x=70/3 请点右上角“采纳答案”。

3.14x(10÷2)x2+3.14x10x6 =3.14x(5x2)+3.14x(10x6) =3.14x10+3.14x60 =3.14x(10+60) =3.14x70 =219.8

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