假设x的值为3,计算x的平方并赋值给y-搜答案-智慧作业帮

#include#includevoidmain(){floatx,y;cin>>x;if(x

m等于3n等于1

x/(x²-3x)×(x²-9)=x/x(x-3)×(x-3)(x+3)=x+3

x+1/x=3(x+1/x)^2=9x^2+2+1/x^2=9x^2+1/x^2=7

对x*(1/9x^2)从0——3积分结果等于9/4

原式=x的四次方-（xj+3）的平方=x^4-x^2-6x-9

用图示法.可以理解为(x,y)为满足4X²+Y²+XY=1的点的集合为一曲线.2x+y=k代表斜率为-2的直线族.显然,当直线与曲线相切于最右边时,k最大.设Y=k-2X,代入曲线

#includevoidmain(){intx,y;scanf("%d",&x);if(x>10)y=2*x*x-x+1;elseif(x>2)y=3*x+6;elsey=0;printf("%d",

|x^2-4x+a|+|x-3|≤5|(x-2)^2+a-4|+|x-3|≤5x=3|a-3|≤5a=-2a=8(舍去)a=-2时|x^2-4x-2|+|x-3|=5+3x-x^2≤5|x^2-4x+

x(3x²+2x+2)-x²(3x+2)=3x³+2x²+2x-3x³-2x²=2x4（x-2)的平方-（2x+3）（2x-3）=4(x&#

2^21-2

3x²+2x²-3x-(-x+5x²)=3x²+2x²-3x+x-5x²=-2x其中x=314时,-2x=-2*314=-6285xy-8x

第2题我来回答吧：由X+2Y=（2X+1）/3X+2Y=（Y-X）/4得：3X+6Y=2X+14X+8Y=Y-X即：X=1-6Y5X+7Y=0消去X,得：23Y=5所以Y=5/23,X=-7/23

=-2x＋3x-1-x-5-12x+4.5=-12x-1.5当x=1时=-12-1.5=-13.5

x＝322的1,2,3,4,5,6次四分之X减四分之x的平方=-56

#includevoidmain(){longintx,y;printf("inputx:");scanf("%d"&x);if(x10)y=x*x-10;y=5*x;printf("y=%d",y)

解(x²-x+2)(x²-2)=x^4-2x²-x³+2x+2x²-4=x^4-x³+2x-4

(x的平方-16)分之(6-5x+x的平方)÷(4-x)分之(x-3)×(4-x的平方)分之(x的平方+5x+4)=(x^2-5X+6)/(X^2-16)×(4-X)/(X-3)×(X^2+5X+4)

3x/(x-3)²+x/(x-3)=3x/(x-3)²+x(x-3)/(x-3)²=(3x+x²-3x)/(x-3)²=[x/(x-3)]²

解(x-x²-5)-(-2x²+x-3)=x-x²-5+2x²-x+3=(2x²-x²)+(x-x)+(3-5)=x²-2∵x=2