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Reciprocate 17/19 with explanation ​

User Kosuke
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2 Answers

10 votes

The reciprocal of a rational number a/b is its multiplicative inverse, 1/(a/b) = b/a. That is, by definition of multiplicative inverse,

a/b • 1/(a/b) = 1

Then

1/(a/b) = b/(a/b • b) = b/a

So, the reciprocal of 17/19 is simply 19/17.

User AdyAdy
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3.6k points
7 votes

hello!

In order to find the reciprocal of a number, we should flop it over.

Now, "flopping over" is not the same as "changing the sign"

If we have a fraction, and we're asked to find its reciprocal, then the numerator and denominator switch places.

Please consult the following formula for more details:-


\sf{The~reciprocal~of~a~is~(1)/(a) }


\sf{The~reciprocal~of~(a)/(b) ~is~(b)/(a) }}

According to the
Reciprocal~formula, the reciprocal of
\displaystyle(17)/(19) is:-


\sf{\displaystyle(19)/(17) }

note:-

Hope everything is clear; if you need any explanation/clarification, kindly let me know, and I'll comment and/or edit my answer :)

User Bernd Petersohn
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3.2k points