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alg

posted by on .

Which expression represents the sum of the following?

(5)/ (2t + 1) + (-1) / (4t^2 + 4t + 1)

a) 10t + 4 / (2t + 1)^2
b) 4 / (2t + 1)^3
c) 4 / 4t^2 + 6t + 2
d) 10t + 1 / (2t + 1)^2

  • alg - ,

    5/(2t + 1)] - 1/(4t^2+4t+1)]
    = [5(2t +1)-1]/(2t+1)^2
    = (10t +4)/(2t+1)^2
    (a) is correct if you add parentheses around (2t+4). Otherwise (a) is ambiguous

  • alg - ,

    thanks drwls

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