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Question

Assertion (A):Iffraction numerator 1 over denominator left parenthesis x minus 2 right parenthesis open parentheses x squared plus 1 close parentheses end fraction equals fraction numerator A over denominator x minus 2 end fraction plus fraction numerator B x plus C over denominator x squared plus 1 end fraction ,then Aequals 1 fifth comma B equals 1 fifth comma C equals negative 2 over 5
Reason (R) : fraction numerator 1 over denominator left parenthesis x minus a right parenthesis open parentheses x squared plus b close parentheses end fraction equals fraction numerator 1 over denominator a squared plus b end fraction open square brackets fraction numerator 1 over denominator x minus a end fraction minus fraction numerator x plus a over denominator x squared plus b end fraction close square brackets

  1. Both A & R are true and R is correct explanation of A
  2. Both A & R are true and R is not correct explanation of A
  3. A is true but R is false
  4. A is false but R is true 

hintHint:

In the question of first statement we will first solve the fraction in RHS and find the coefficients of x squared, x and the constant term then we will compare the numerator of both the sides to get the value of A B C.
In second statement also we will solve the RHS to know whether LHS= RHS or not.

The correct answer is: A is false but R is true


    fraction numerator 1 over denominator left parenthesis x minus 2 right parenthesis open parentheses x squared plus 1 close parentheses end fraction equals fraction numerator A over denominator x minus 2 end fraction plus fraction numerator B x plus C over denominator x squared plus 1 end fraction
space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator A left parenthesis x squared plus 1 right parenthesis plus B x plus C left parenthesis x minus 2 right parenthesis over denominator left parenthesis x minus 2 right parenthesis left parenthesis x squared minus 1 right parenthesis end fraction
space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator A x squared plus A plus B x squared minus 2 B x plus C x minus 2 C over denominator left parenthesis x minus 2 right parenthesis left parenthesis x squared minus 1 right parenthesis end fraction
space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator x squared left parenthesis A plus B right parenthesis plus x left parenthesis C minus 2 B right parenthesis plus A minus 2 C over denominator left parenthesis x minus 2 right parenthesis left parenthesis x squared minus 1 right parenthesis end fraction
N o w comma space A plus B equals 0 space space space space space space space space space space space space space space space space space space space space space C minus 2 B equals 0 space space space space space space space space space space space space space space space space space space space space space space space A minus 2 C equals 1
space space space space space space space space rightwards double arrow A equals negative B space space space space space space space space space space space space space space space space space space rightwards double arrow C equals 2 B space space space space space space space space space space space space space space space space space space space space space space space space space space rightwards double arrow negative B minus 4 B equals 1
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space rightwards double arrow negative 5 B equals 1 rightwards double arrow B equals fraction numerator negative 1 over denominator 5 end fraction
t h e r e f o r e space s t a t e m e n t space 1 space i s space n o t space t r u e.                                             fraction numerator 1 over denominator left parenthesis x minus a right parenthesis open parentheses x squared plus b close parentheses end fraction equals fraction numerator 1 over denominator a squared plus b end fraction open square brackets fraction numerator 1 over denominator x minus a end fraction minus fraction numerator x plus a over denominator x squared plus b end fraction close square brackets
R H S equals fraction numerator 1 over denominator a squared plus b end fraction open square brackets fraction numerator x squared plus b minus x squared plus a squared over denominator open parentheses x minus a close parentheses open parentheses x squared plus b close parentheses end fraction close square brackets
space space space space space space space space space equals fraction numerator 1 over denominator a squared plus b end fraction open parentheses fraction numerator a squared plus b over denominator open parentheses x minus a close parentheses open parentheses x squared plus b close parentheses end fraction close parentheses
space space space space space space space space space equals fraction numerator 1 over denominator left parenthesis x minus a right parenthesis open parentheses x squared plus b close parentheses end fraction
L H S equals R H S
t h e r e f o r e space s t a t e m e n t space 2 space i s space t r u e.

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