What is the value of X ?

1. x^2 + 1 = 1 / ( x^2 +1 )
2. x^3 + x^2 = 0

• Both the eqns give the solution x= 0 so
  1 or 2 alone is sufficient ..so ans is D
• 8 years agoHelpfull: Yes(12) No(2)
• 0 ;first i do cross multiplication and then solve using quadratic equation which give x^2=0 and x^2=-2.for 2nd take x^2 as common which gives x=0 and x=-1.so x=0 satisfies both the question . Hence,answer is 0.
• 8 years agoHelpfull: Yes(5) No(1)
• Only statement 1 is required for determining the value of X
  ((x^2+1)^2 -1)/(x^2+1)=0
  x^2(x^2+2)/(x^2+1)=0
  Hence x=0
  Thus statement 1 is enough only if it is given x is real.
• 8 years agoHelpfull: Yes(3) No(1)
• only option a is sufficient to find the value of x.
  (1+x^2)^2=1
  x=+sqrt2i 0r -sqrt2i
  x=0
  
• 8 years agoHelpfull: Yes(1) No(4)
• Only statement 1 is sufficient for determining the value of X
  Do cross multiplication
  (x^2+1)^2=1
  then to have x^2+1)^2 equal to 1 x have only one value which is 0
  
• 8 years agoHelpfull: Yes(1) No(1)
• From
  stmt 1: x=0,0, +/-sqrt(-2)
  stmt 2: x=0,0,-1
  so x=0
  therefore both stmt 1 & 2 are required because none statement alone gives any particular value for x.
• 4 years agoHelpfull: Yes(1) No(0)