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Rational Numbers

Question 15If...

Question

Question 15
If x is any rational number, then x + 0 is equal to
(a) x
(b) 0
(c) – x
(d) Not defined

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Solution

If x is any rational number, then
x + 0 = x [ $∵$ 0 is the additive identity]

Hence, option (a) is correct.

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Question 15
If x is any rational number, then x + 0 is equal to
(a) x
(b) 0
(c) – x
(d) Not defined

x \in (π, \frac{3 π}{2})

\sqrt{\frac{1 - sin x}{1 + sin x}}

Question 4

For any non-zero rational numbers $x$ and $y$ , $x^{5} \div y^{5}$ is equal to
(a) $(x \div y)^{1}$
(b) $(x \div y)^{0}$
(c) $(x \div y)^{5}$
(d) $(x \div y)^{10}$

y

is the reciprocal of the rational number

x

, then the reciprocal of

y

Question 14

In the following question, out of the four options, only one is correct. Write the correct answer:

If x be any non-zero integer, then $x^{- 1}$ is equal to:
(a) x
(b) $\frac{1}{x}$
(c) -x
(d) $\frac{- 1}{x}$

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Rational Numbers

Standard VIII Mathematics

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