Using remainder theorem when f(x) is divided by (2x+1) the remainder is given when;
`x = -1/2`
`= f(-1/2) `
`= (-1/2)^3 - (1/2)^2 + 1`
`= -1/8 - 1/4+ 1`
So the remainder is 5/8. Correct answer is B.
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