Which of the following is equivalent to

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Which of the following is equivalent to (2b^-1) - (2^-1)b/(b^-1) + (1^-1) ?

A) 1-b/2

B) b-1/2

C) (b^2)-1/2b

D) (1-b^2)/2b

E) 2b/(1-b^2)

OA [/img]A

Can someone explain how to solve this?

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by bharathh » Sat Sep 05, 2009 2:38 pm
What am I doing wrong? i can't seem to factor it beyond a certain point. Is the equation in the question correct?

Rewriting the eqn in the question

=> 2/b - b^2/2 + 1

Taking LCM of 2b for all three terms

=> (4 - b^3 + 2b)/2b

=> (4 - b( b^2 + 2)) /2b

Can't go any further.