math

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The sales (in millions of dollars) of a laser disc recording of a hit movie t years from the date of release is given by

S(t)=[{4t+1}/{t^3+1}]

How fast is the sales changing one year the laser discs are released?

  • math -

    substitute t=1 in
    S(t)=[{4t+1}/{t^3+1}]
    to get
    S(1)=[{4*1+1}/{1^3+1}]
    Can you evaluate S(1)?

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