Q. Write the repeating decimal as a fraction..002002002
Identify Repeating Pattern: Identify the repeating pattern in the decimal.The repeating pattern is 002, which repeats indefinitely after the decimal point.
Express as Infinite Sum: Express the repeating decimal as an infinite sum of its repeating parts.0.002002002…=0.002+0.000002+0.000000002+…
Convert to Fractions: Convert each term of the sum into a fraction.0.002=10002, 0.000002=10000002, 0.000000002=10000000002, and so on.
Recognize Geometric Series: Recognize that the sum forms a geometric series with the first term a1=10002 and the common ratio r=10001.
Use Sum Formula: Use the formula for the sum of an infinite geometric series, S=1−ra1, to write the repeating decimal as a fraction.Substitute a1=10002 and r=10001 into the formula.S=1−10001(10002)
Simplify Expression: Simplify the expression by performing the operations.S=10002/1000999S=10002×9991000S=9992
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