21. |
|
||||||||
Answer:
Option (b) |
22. |
|
||||||||
Answer:
Option (d) |
23. |
If a ∗ b = ab + 1 on R, is _____
|
||||||||
Answer:
Option (a) |
24. |
If a ∗ b = a2 + b2 on Z, then ∗ is _____
|
||||||||
Answer:
Option (b) |
25. |
|
||||||||
Answer:
Option (a) |
26. |
|
||||||||
Answer:
Option (b) |
27. |
|
||||||||
Answer:
Option (a) |
28. |
S is defined on N × N by ((a, b), (c, d)) ∈ S ⇔ a + d = b + c _____
|
||||||||
Answer:
Option (c) |
29. |
Let S be the relation on the set A = {5, 6, 7, 8},
S = {(5, 6), (6, 6), (5, 5), (8, 8), (5, 7), (7, 7), (7, 6)}, then _____
|
||||||||
Answer:
Option (b) |
30. |
|
||||||||
Answer:
Option (b) |