Negative exponents mean that the base is on the wrong side of the fraction line. For example, x^-2 is the same as 1/x^2. In this example, 1/2^-2 would be 2.
2/1^2 = 2
For the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula
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<h3>What is number series?</h3>
When the numbers are arranged in a series with some logic then it is called as the number series.
here we have a series:

The sum of the series will be given as:


Hence for the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula 
To know more about number series follow
brainly.com/question/6561461
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All significant digits...
it is c and dont get it wrong
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