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Fill in the blanks.
(i) Zero has_____ reciprocal.
(ii) The numbers_____ and____ are their own reciprocals.
(iii) The reciprocal of $ -5 $ is____.
(iv) Reciprocal of $ \frac{1}{x} $, where $ x
≠0 $ is____.
(v) The product of two rational numbers is always a________.
(vi) The reciprocal of a positive rational number is______.
To do:
We have to fill in the given blanks.
Solution:
(i) Zero has no reciprocal.
Any number divided by zero is not defined. Therefore, zero has no reciprocal.
(ii) The numbers $1$ and $-1$ are their own reciprocals.
Reciprocal of $a$ is $\frac{1}{a}$.
This implies,
Reciprocal of $1$ is $\frac{1}{1}=1$.
Reciprocal of $-1$ is $\frac{1}{-1}=-1$.
(iii) The reciprocal of \( -5 \) is $-\frac{1}{5}$
Reciprocal of $a$ is $\frac{1}{a}$.
Reciprocal of $-5$ is $\frac{1}{-5}=-\frac{1}{5}$.
(iv) Reciprocal \( \frac{1}{x} \), where \( x ≠ 0 \) is $x$.
Reciprocal of $a$ is $\frac{1}{a}$.
This implies,
Reciprocal \( \frac{1}{a} \), where \( a ≠ 0 \) is $a$
(v) The product of two rational numbers is always a rational number.
For example,
$\frac{1}{3}\times\frac{2}{5}=\frac{1\times2}{3\times5}$
$=\frac{2}{15}$
Here, $\frac{1}{3}, \frac{2}{5}$ and $\frac{2}{15}$ are rational numbers.
(vi) The reciprocal of a positive rational number is positive.
For example,
The reciprocal of $5$ is $\frac{1}{5}$
Here, $5$ and $\frac{1}{5}$ are both positive.
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