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Question

Find the sum of all integral values of x interval [4,100] satisfying |2x(2x1)2|=1

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Solution

f(x)=2x(2x1)2=1|2x|2x1||=12x1<0x<12x[4,0]2x×((2x1))=14x22x=14x22x1=0x[0,12]2x(12x)=12x4x2=14x22x+1=0x>124x22x=14x22x1=0sum=0
No integral values possible.

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