PEA key

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[Seecha]

http://www.ctanujit.org/uploads/2/5/3/9/25393293/ctanujit_classes_of_mathematics_statistics___economics.pdf

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[Abhitesh]

1. C
2. A
3. D
4. D
5. C
6. A
7. B
8. D
9. D
10. B
11. B
12. A
13. A
14. B
15. C
16. D
17. A
18. D
19. C
20. C
21. B
22. C
23. C
24. C
25. A
26. C
27. D
28. D
29. C
30. D

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[Abhitesh]

Yes , its A for Q20.

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[Addy-2]

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[Abhitesh]

In Q.7 put x=root(2).

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[Abhitesh]

x^2-[x] = +/- 1
x^2 +/- 1 =[x]

Plot the graph of LHS and RHS and check their intersection.

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