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sir pls give answer of this question If x+1/x=3 where x is not equal to 0 then the value of x 4 -3x 3 -5x 2 -3x-1 / x 4 -1 is ?? options a)5 b)7 C)2 d)3

sir pls give answer of this question
If   x+1/x=3    where x is not equal to 0 then the value of
x4-3x3-5x2-3x-1 / x4-1   is ??
options 
a)5 
b)7
C)2
d)3

Grade:12th pass

1 Answers

Asim
17 Points
5 years ago
x+ 1 = 3x
 x =( 3 \pm \sqrt{5}) / 2         put these values and check... or … x ^2  +  1/x^2 = 1   thats a hint, check it out its gonna help you a lot... TIY

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