real number x,y,a,satisfied |x|+|y||x|+|y|=

real number x,y,a,satisfied |x|+|y||x|+|y|= For p(x)=3x^9+2x^6+3x^3-2x^2+x-1A)find the possible number of positive real roots.B)find the possible number of negative real roots. For p(x)=3x^9+2x^6+3x^3-2x^2+x-1A)find the possible number of positive real roots.B)find the possible number of negative real roots If the root equation (a²-1)x+5|b|-10=0 had inn,(a,b) is a pair of the real number,then the pair of real number (a,b) is ( ) Real Account Number 是什么意思 For what values of x do the following represent real number?(a) 1/√(x² - 16)(b) 1/√(36 - x²) 希望杯英文数学题the number of integer solutions for the system of inequalities x-2a≥0 3-2x>-1 about x is just 6 ,then the range of value for real number a is( ) 2005全国希望杯数学竞赛试题[一道英语数学题]For-a-real-number-a,let[a]denote-the maximum-integer-which-does-not-exceed-a.For example,[3.1]=3,[-1.5]=-2,[0.7]=0.Now let.x+1f(x)=—.x-1,then[f(2)]+[f(3)]+L+[f(100)](real-number:实数,t 问一道集合函数题设计和Sa={（x,y）|x=a+cosα,y=a/2+sinα,α属于R} 其中a为实常数1） Sa是怎么的图形?2）若Sa真包含于{（x,y）|x^2+y^2 How to solve The number of real solution to the equation x/sinx=100 is 英语翻译If the root of equation(a2-1)x+5|b|-10=0 had innumerablity,(a,b)is a pair of the real number,then the pair of real number (a,b)is_______求翻译“终←消逝”（妹子你别捣乱） what is the greatest number of real roots a polynomial of degree 4 can have?explain? a real 12.Let f(x) = x^2 + 6x + c for all real numbers x,where c is some real number.For what values of c does f(f(x)) have exactly 3 distinct real roots? matlab在解方程组时,如何给变量限定一个范围区间?>> syms SA Tab Tac theta x y;>> eq1=SA^2+1-2*SA*cos(pi/2-theta)-(SA+340*Tac)^2;>> eq2=SA^2+1-2*SA*cos(theta)-(SA+340*Tab)^2;>> [SA,T]=solve(eq1,eq2)这样直接解出来会有四组解, matlab中在解方程组时,如何给其中一个变量限定一个范围区间?>> syms SA Tab Tac theta x y;>> eq1=SA^2+1-2*SA*cos(pi/2-theta)-(SA+340*Tac)^2;>> eq2=SA^2+1-2*SA*cos(theta)-(SA+340*Tab)^2;>> [SA,T]=solve(eq1,eq2)这样直接解出来 I _______ don't know his telephone number.A.real B.reallyIt rained ______last night.A.heavy B.heavily if the function f satisfies the equation f(x+y)=f(x)+f(y) for every pair of real numbers x and y,what are the possible values of f(0) A.any real numberB.any positive real numberC.0 and 1 onlyD.1 onlyE.0 only