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Negation of a Number

Question 13- ...

Question

Question 13
- (-x) is same as
(a) -x
(b) x
(c) $\frac{1}{x}$
(d) $\frac{- 1}{x}$

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Solution

- (-x) = x
Negative of negative rational number is equal to a positive rational number. Hence, the correct answer is option (b).

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Similar questions

Question 13
- (-x) is same as
(a) -x
(b) x
(c) $\frac{1}{x}$
(d) $\frac{- 1}{x}$

If f (x) = \frac{x - 1}{x + 1}, then find f(f(x)).

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) $\frac{- 1}{x}$

\int e^{\sqrt{x}} d x = f (x) + C; x > 0

f (x)

f : R \to (- 1, 1)

f (x) = \frac{- x | x |}{1 + x^{2}}, then f^{- 1} (x)

\sqrt{\frac{|x|}{1 - |x|}}

S g n (x) \sqrt{\frac{|x|}{1 - |x|}}

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

(d) None of these

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Negation of a Number

Standard VIII Mathematics

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