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Grade 12Algebra

The no. of roots of the equation x-2/x-2=1-2/x-1 is

Profile image of pallavi  pradeep bhardwaj
16 Years agoGrade 12
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1 Answer

Profile image of Badiuddin askIITians.ismu Expert
16 Years ago

Dear Pallavi

x- 2/(x-2)=1-2/(x-1)

simplyfie it

f(x)= x3 -4x2 +5x -4=0

now f'(x) = 3x2 -8x +5

      discrimnent of this is negative  so 

  f'(x) >0 for all x

it means f(x) is an incresing function . so it will cut the x axix only at one point so number of real root of this  equation is one

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