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March 27, 2017

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find domain of f(x) = 15/sqrt(x+6)

  • precalc - ,

    hint: what values of x can be?
    since you can't have negative numbers under a square root, sqrt(x+6)>or=0
    find x

  • algebra - ,

    simplify:


    sq rt of 15/5 * sq rt of 20

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