解方程3a+3d=18,a(a+d)(a+2d)=66
计算A+(A+D)+(A+2D)+.+(A+99D)
已知:a/b=c/d,求证:(2a+3b)/(a+b)=(2c+3d)/(c+d)
已知a/b=c/d,求证2a+3b/a+b=2c+3d/c+d
(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b+3c))>=2/3
数学解方程,复杂啊-12=3a+2b+c ①0=-a+b-c+d②0=27a+9b+3c+d③1=a+b+c+d④帮忙解
scanf("%d%d",&a,
int a=2,b=3; printf(a>b?”***a=%d”:”###b=%d”,a,b); 求结果,
我想知道main() {int a=1,b=2,c=3; printf(“%d,%d,%d,%d\n",a=b=c,a=
实数a,b,c,d满足d>c;a+b=c+d;a+d
a+b=3/5 a+d=3/7 d+c=2/5
若a-b=-3,c+d=2,求(b+c)-(a-d)的值
已知a-b=3,c +d=2,(b+c )-(a-d)的值为?