编写一个主函数,假定a和b的取值范围为:6《a《50,10《b《30,求出满足不...答:a=20,b=30 22,27 24,24 26,21 28,18 30,15 32,12 例如:include<stdio.h> int main(){ int a,b,fb;scanf("%d%d",&a,&b);fb = abs(b);printf("a+|b| = %d\n", a+fb);return 0;}
已知a+b=3,ab=2,求a²+b²的值答:=(a+b)²-2ab=9-4=5 (2)ab = ((-(a-b)²)+(a²+b²))/2 = 12 解法2:(1)联立a+b=3,ab=2 ,解得a=1,b=2或a=2,b=1.∴a²+b²=5 (2)联立a-b=1,a²+b²=25,解得a=4,b=3或a=-3,b=-4,∴ab=12 ...