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What is the opposite and reciprocal of 9?

Answer 1

Avery Alexander

Opposite of 9: -9 Reciprocal of 9: 1/9

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Answer 2

Nathan Axel

#-9# is the opposite
#1/9# is the reciprocal

The opposite of a positive number is to add a negative sign. (Note: if the number is negative, you will change it to a positive number).

#"the opposite of 9 is -9"#

The reciprocal is simply flipping the denominator and numerator of a fraction. #9# is the same as saying:

#9/1# because any number divided by #1# is itself.

So we will flip:

#9/1 =>1/9# is the reciprocal.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.