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What does "c ≠ 0" mean? I've heard the "≠" sign means "does not equal." Does this mean that c ≠ 0 means that "(variable) does not equal zero"? What is it's usage?

  • Math Question -

    yes, it means "not equal"

    suppose you had
    y = 4/(x-5) and you wanted the domain of the function

    that is, what values of x could I use ??

    Well, we could use any real number for x, except 5

    and we would write it as:
    x = any real number, x ≠ 5

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