x4+1÷324
x4+1÷324
x5+x4+1.
x4次方y立方÷1/2xy平方
已知x2+x+1=0 求x4+1/x4
(1)x4-12x+323
x4-47x²+1
(324又7分之1-810又6分之1+486.5)x4.2 简便运算 急~~~~~~~~~~~~~~~~~~~~~~~~
那1+2÷3x4+5+6-7÷8=1
lingo软件求教max=1/2*x1*x2*@sin(x4)+1/2*x2*x3*@sin(120-x4);x4>0;
—5的平方一[(-2的立方)+(1-0.8x4分之3)]÷|-1-1|
计算(X5+X4+5X2+5X+6)÷(X2+X+1)=
1÷4分之3=( )x4分之3=21分之( )