y=x/(x-k),where k is a constant,and x is real number.show that.
1.y increase with increase in x.
2.y decreases first and then increase with the value of x.
3.y increase then decrease with the value of x.
4.it reamins constant.

• correct option is 3 as by putting different values of x at constant value of k, we get values of y which first increases and then decreases with value of x.
• 8 years agoHelpfull: Yes(10) No(2)
• value of Y is decreasing only when value of X is increasing.
  So, none of above. eg.
  let take k=2 and let vary x=1,2,3....
  
  1)x=1, y=1/1-k=-1
  2)x=2, y=2/2-2=0
  3)x=10,y=10/8=1.25
  4)x=11,y=11/9=1.222
  and so on.
  
• 8 years agoHelpfull: Yes(4) No(4)
• ify=x/(x-k) let to be k=1 and x=1,2,3,4,5,,6,7,8,9,,10,11,12,........and so on
  x=1 y=1/(1-1)=1/0=undefined
  x=2 y=2/(2-1)=2/1=2
  x=3 y=3/(3-1)=3/2=1.5
  x=4 y=4/(4-1)=4/3=1.33
  x=5 y=5/(5-1)=5/4=1.25
  x=6 y=6/(6-1)=6/5=1.2 so in my point of view 3rd option is correct y increase then decrease with the value of x.
  because if we will see the result down to up
• 8 years agoHelpfull: Yes(4) No(0)
• Actually the question was y=(x/x) - k
  and the option would be 4 because y has constant value
  
• 8 years agoHelpfull: Yes(3) No(0)
• It frst increase with x n den decrse e.g
  X=1 y=-1 den x=2 y=0 den x=3 y=3 n den x=4 y= 2 keepng k const at 2
• 8 years agoHelpfull: Yes(1) No(3)
• if we taking k=5 and putting the values of x from 2 to 9.
  then the values of y will be
  first decreases then increases and then decreases.
  
  m confused between option 2 and 3
• 8 years agoHelpfull: Yes(1) No(0)
• It increases first and then decreases.....
• 8 years agoHelpfull: Yes(1) No(0)
• option 2 is correct because when value of x is increase then y is decreases.
• 8 years agoHelpfull: Yes(0) No(5)
• i think the ans will be option a.because the given equation representing a stright line
• 8 years agoHelpfull: Yes(0) No(0)
• ans is option 3. because if we decrease the value of x then value of y will increase.
• 8 years agoHelpfull: Yes(0) No(0)
• right option is 3 not 2 .. so it is correct or not pls tell me admin ...... because it is a Que. of elitmus
• 8 years agoHelpfull: Yes(0) No(0)
• 2.> y decrease first and then increase with the value of x
• 8 years agoHelpfull: Yes(0) No(0)