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Consider the following statements. I. ...

Consider the following statements.
I. The relation R = `{(x,x^(3))` : x is a parime number less then 10 }
II. The range of the relation
R = { (x + 2, x + 4)), x `in` N , x `lt` 8} is {1,2,3,4,5,6,7}.
Choose the correct option.

A

Only I is true.

B

Only II is true.

C

Both are true

D

Both are false

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze both statements one by one. ### Step 1: Analyze Statement I The first statement is about the relation \( R = \{(x, x^3) : x \text{ is a prime number less than 10}\} \). 1. Identify the prime numbers less than 10: - The prime numbers are: 2, 3, 5, and 7. 2. Create ordered pairs \( (x, x^3) \): - For \( x = 2 \): \( (2, 2^3) = (2, 8) \) - For \( x = 3 \): \( (3, 3^3) = (3, 27) \) - For \( x = 5 \): \( (5, 5^3) = (5, 125) \) - For \( x = 7 \): \( (7, 7^3) = (7, 343) \) 3. Therefore, the relation \( R \) is: \[ R = \{(2, 8), (3, 27), (5, 125), (7, 343)\} \] ### Step 2: Analyze Statement II The second statement is about the range of the relation \( R = \{(x + 2, x + 4) : x \in \mathbb{N}, x < 8\} \). 1. Identify the values of \( x \): - Since \( x \) is a natural number and \( x < 8 \), \( x \) can take values: 1, 2, 3, 4, 5, 6, 7. 2. Create ordered pairs \( (x + 2, x + 4) \): - For \( x = 1 \): \( (1 + 2, 1 + 4) = (3, 5) \) - For \( x = 2 \): \( (2 + 2, 2 + 4) = (4, 6) \) - For \( x = 3 \): \( (3 + 2, 3 + 4) = (5, 7) \) - For \( x = 4 \): \( (4 + 2, 4 + 4) = (6, 8) \) - For \( x = 5 \): \( (5 + 2, 5 + 4) = (7, 9) \) - For \( x = 6 \): \( (6 + 2, 6 + 4) = (8, 10) \) - For \( x = 7 \): \( (7 + 2, 7 + 4) = (9, 11) \) 3. Collect the second elements to find the range: - The second elements from the pairs are: 5, 6, 7, 8, 9, 10, 11. - Thus, the range of the relation is: \[ \text{Range} = \{5, 6, 7, 8, 9, 10, 11\} \] ### Step 3: Compare the Range with the Given Set The statement claims that the range is \( \{1, 2, 3, 4, 5, 6, 7\} \). However, we found that the actual range is \( \{5, 6, 7, 8, 9, 10, 11\} \). Therefore, this statement is false. ### Conclusion Both statements are false. Thus, the correct option is: - **Option D: Both statements are false.**
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DISHA PUBLICATION-RELATIONS AND FUNCTIONS -EXERCISE - 1
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  3. Consider the following statements. I. The relation R = {(x,x^(3)) :...

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  4. Figure 2.14 shows a relation R between the sets P\ a n d\ Q . Write th...

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  5. The domain of relation R = {(x,y) : x^(2) + y^(2) = 16, x, y in Z } ...

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  6. If A = {a,b,c,d}, B = {1,2,3}, Which of the following sets of ordered ...

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  7. If A = {1,2,4}, B = {2,4,5} , C = {2,5} , then (A - C ) xx (B - C) is ...

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  8. If (AxxA) has 9 elements two of which are (-1,0) and (0,1), find the ...

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  9. the value of the function f(x)=(x^2-3x+2)/(x^2+x-6) lies in the inter...

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  10. Let A = {1,2,3,4}, B = { 1,5,9,11,15,16} and f = {(1,5), (2,9),(3,1),(...

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  11. Which of the following relation is a function ?

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  12. For which Domain, the functions f(x) = 2x^2-1 and g(x)=1-3x are equal ...

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  13. The domain of the function f(x) = (1)/(sqrt(9 - x^(2))) is

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  14. There are three relations R(1) , R(2) and R(3) such that R(1) = {(2,...

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  15. The domain of definiton of the function f(x)=(1)/(sqrt(x^(12)-x^(9)+x^...

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  16. The domain and range of the real function f defined by f(x)=(4-x)/(x-4...

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  17. Let N be the set of natural numbers and the relation R be defined on ...

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  19. The domain of the function f given by f(x) = (x^(2)+ 2x+ 1)/(x^(2) - 5...

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  20. Find the domain of f(x)=sqrt((log)(0. 4)((x-1)/(x+5)))

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