Answers

2015-02-20T16:30:09+05:30
A-1/2a = 1
=>(2a²-1)/2a=1
=>2a²-1=2a
=>2a²=2a+1
=>a= (2a²-1)/2
=>a=a²-1/2
=>a²-a=1/2
so the answer is 1/2
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