If k=x/3 and x≠0,what does 3x equal in terms of A.k B.9k C.9/k D.k/9 E.k/3If k=x/3 and x≠0,what does 3x equal in terms of A.k B.9k C.9/k D.k/9 E.k/3做不来,怀疑是题目没看懂

If k=x/3 and x≠0,what does 3x equal in terms of A.k B.9k C.9/k D.k/9 E.k/3If k=x/3 and x≠0,what does 3x equal in terms of A.k B.9k C.9/k D.k/9 E.k/3做不来,怀疑是题目没看懂 It is given that f(x-1)= -2(x-1)^3 + (x-1)^2 +x-1 and g(x)=2x^3 - x^2 - x +k.If..It is given that f(x-1)= -2(x-1)^3 + (x-1)^2 +x-1 and g(x)=2x^3 - x^2 - x +k.If the graph of y= g(x) is obtained by translating the graph of y=f(x) upwards by 3 units,an Quadratic Equation(二次方程式的问题)let k be a constant,if A and B are the roots of the equation x^2 - 3x +k = 0,the A^2 + 3B = k 是恒数,如果A和B是x ^2 - 3x+ k= 0的根,A^2 + 3B = Let f(x)=25x^2+kx+2,where k is real.(a) If f(x)=0 has equal roots,find the value(s) of k,leaving your answer(s) in simplest surd form.(3marks)(b) If a is the smaller positive root of the quadratic equation f(x)=0,and one root is half of the other,exp Suppose X has a geometric distribution with parameter p.Show that if n and k are positiveintegers,thenP(X = n + kjX > n) = P(X = k): If two rational number x,y satisfy |x|+y=3 and |x|y+x*x=0 ,then x=___ y=___? A linear transformation of three-dimensional space is defined by r'=Mr,出自那本红色的futher pure mathematics.接着题目where r'=x' r=x M= 2 1 -1y' y -1 0 3z' z 2 k 4a)show that the transformation is singular if and only if k=2.上面那r' r (|k|-1)x^2+(k+1)x+3=0 INPUT x IF x>9 AND x if( x=3 ) 1.The line -6x+8y-k=0 cuts the positive x-axis at A and the positive y-axis at B.If AB is 16.5 units,find k.2.Find the equation of the line that is the perpendicular bisector of the segment with end-points (3,6) and(7,2) . If x and y are positive integers such that x=8y+12,what is the greatest common divisor of x and 1) x=12u,where u is an integer2) y=12z,where z is 由题知:x=4(2y+3)由(1)知:x=12u 则y=3k k is an integer.x=12(2k+1) 则x,y最大公因子不能确定. 分段函数 lingo@for(point(q) |q#ne#6#and#x(k,q)#eq#1#and#x(q,t)#eq#1:S=@if(m(q)#ge#0,S+m(q),S-m(q)));和@for(point(i) | x(k,i)#eq#1#and#x(i,t)#eq#1:S=@if(m(i)#ge#0#and#(S+m(i))#le#60,S+m(i),@if(m(i)#ge#0#and#(S+m(i))#gt#60,60,@if(m(i)#lt#0#and#(S+ 编一个程序求π的近似值#include void main(void){double x,y,k=1;while (y>=1e-6){ if(k>0){x=4*1/k+x;y=1/k;k=(k+2)*(-1);}else{k=k*(-1);x=4*1/k*(-1)+x;y=1/(k*(-1));}}cout y=x+k/x,当k>0和k 若(k-1)x的平方+(k-2)x+(k-3)=0是关于x的一元一次方程,求k 解关于x的方程(k+1)x²-(k²+3k)x+(k²-1)=0 将分段函数y=x(x=0and x10)编程用if else 语句