Question

what is the answer for this questions

did you answer for this all questions with in 5.30 l will you big price​

Answer 1

Answer:

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Step-by-step explanation:

The answers are :

10. IV

11. IV

12. I

13. II

14. IV

15. I

Answer 2

Question:

10. Which of the following is the reciprocal of the reciprocal of a rational number?

i) - 1 $\qquad$ ii) 1

iii) 0 $\qquad$ iv) The number itself

Solution:

Here, we are asked that what will be the reciprocal of the reciprocal of a rational number.

Now, if we have already reciprocal of a number and we have to reciprocate it, so that number will be the number itself.

➳ Let's understand with an example.

$\rm {\dfrac{1}{9}}$ is the reciprocal of 9, now if we are asked to find the reciprocal of $\rm {\dfrac{1}{9}}$ then the answer will be 9 ( the number itself) .

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Question:

Between two given rational numbers, we can find

• I) One and only rational number.
• ii) only two rational numbers
• iii) only ten rational numbers
• iv) Infinitely many rational numbers

Solution:

➳ There exists infinite rational numbers between two rational number, so we can find infinitely many rational numbers between two rational numbers.

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Question:

$\sf {\dfrac {x+y}{2}}$ is a rational number

• i) between x and y
• ii) less than x and y both
• iii) greater than x and y both
• iv) less than x but greater than y

Solution:

This is the method by which we can find a rational number between two rational number.

➳ Let's understand with an example.

Example Question,

• Find 1 rational number between 8 and 6 ( We know the answer is 7, but we have to find it by this formula.)

So, x= 8 and y = 6

$\sf { \dfrac{x + y}{2} = \dfrac{8 + 6}{2} = \cancel{ \dfrac{14}{2} } = 7}$

So, from this example we easily understood that this formula is used to find a rational number between x any y.

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Question:

$\large \rm { - (-x)}$ is same as

• $\large \rm { -x}$
• $\large \rm { x}$ (Correct answer)
• $\large \rm { \dfrac{1}{x}}$
• $\large \rm { \dfrac{21}{8}}$

Answer:

In this question we have to open the bracket to find the correct value,

So, we know that $\large \rm {( -) \times (-) is (+) }$

$\large \rm {\therefore - (-x) = +x \: or \: x}$

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Question :

The multiplicative inverse of $\sf { - 1 \dfrac{1}{7}}$ is

• $\large \rm { \dfrac{8}{7}}$
• $\large \rm {- \dfrac{8}{7}}$
• $\large \rm { \dfrac{7}{8}}$
• $\large \rm {- \dfrac{7}{8}}$ (correct answer)

Solution:

So here in the question, we can write $\sf { - 1 \dfrac{1}{7}}$ as $\sf {- \dfrac{8}{7}}$

Now, the multiplicative inverse of $\sf {- \dfrac{8}{7}}$ is $\sf {- \dfrac{7}{8}}$

So, the answer is $\sf {- \dfrac{7}{8}}$.

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Question:

The additive inverse of $\sf { - 1 \dfrac{1}{7}}$ is

• $\large \rm { \dfrac{8}{7}}$ (Correct answer)
• $\large \rm {- \dfrac{8}{7}}$
• $\large \rm { \dfrac{7}{8}}$
• $\large \rm {- \dfrac{7}{8}}$

Solution:

Now here in the question we have to find the additive inverse of $\sf { - 1 \dfrac{1}{7}}$.

So here, we can write $\sf { - 1 \dfrac{1}{7}}$ as $\sf {- \dfrac{8}{7}}$.

And,

Now, the additive inverse of $\sf {- \dfrac{8}{7}}$ is $\sf { \dfrac{8}{7}}$.

So, the answer is$\sf { \dfrac{8}{7}}$

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