![]() There are actually several notational conventions for representing repeating decimals, but none of them are accepted universally. Note that in the problem above, the repeating decimal is represented informally by an ellipsis (three periods. The solution and the formulas are described below the calculator. This calculator uses this formula to find out the numerator and the denominator for the given repeating decimal. Indeed, the solution to this problem requires the formula for the infinite geometric series. Of course, in this example problem we are actually asked to convert a repeating decimal to a fraction. ![]() When you start learning geometric sequences, you may come across a problem formulated like this:
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