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The 2018 domestic postage rate for first-class letters weighing 3.5 ounces or less is 50 cents for the first ounce (or less) plus 21 cents for each additional ounce (or part of an ounce).  Express...

The question says: ”Given that S(sub12) is equal to half the sum of the infinite geometric sequence, find x, giving your answer in the form 2^p, where p has the domain of Q.  S(sub12)...

y=f(x), for -4 ≤ x ≤ 5.  Write down the value of f(-3).  Write down the value of f^-1(1).  Find the domain on f^-1.  Sketch rhe graph of f^-1.

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