T T T T T T T T T T F 50. For all natural numbers a, a² = 0 (mod 4) or a² = 1(mod 4) F 51. For all natural numbers a, If a² = 2 (mod 4), then 1 = 2. For all natural numbers a, If a² = 2 (mod 4), then 1 ‡ 2. The negation #51 is true. The negation # 52 is true. F 52. F 53. F 54. F 55. The converse of #51 is true. F 56. The converse of #52 is true. F 57. The contrapositive of #51 is true. The contrapositive of #52 is true. F 58. Е 59 The contrapositive of #52 is true

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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I need help with the explanation for how to find if True or False and why...

For the first 3 statements I'm unsure how to check or understand why they are true or false but I believe the the following for them is 50 T, 51 T (If P false and Q false then True... don't understand why P is false in this case though...), 52 T

For Negations, Converse and Contrapositives how do I know if they are true or not? 

Is it if Original in True then Negation is False? If Original True Contrapositive True? What about Converse?

**Question 50**: For all natural numbers \( a \), \( a^2 \equiv 0 \pmod{4} \) or \( a^2 \equiv 1 \pmod{4} \).

**Question 51**: For all natural numbers \( a \), if \( a^2 \equiv 2 \pmod{4} \), then \( 1 = 2 \).

**Question 52**: For all natural numbers \( a \), if \( a^2 \equiv 2 \pmod{4} \), then \( 1 \neq 2 \).

**Question 53**: The negation of #51 is true.

**Question 54**: The negation of #52 is true.

**Question 55**: The converse of #51 is true.

**Question 56**: The converse of #52 is true.

**Question 57**: The contrapositive of #51 is true.

**Question 58**: The contrapositive of #52 is true.

**Question 59**: The contrapositive of #52 is true.
Transcribed Image Text:**Question 50**: For all natural numbers \( a \), \( a^2 \equiv 0 \pmod{4} \) or \( a^2 \equiv 1 \pmod{4} \). **Question 51**: For all natural numbers \( a \), if \( a^2 \equiv 2 \pmod{4} \), then \( 1 = 2 \). **Question 52**: For all natural numbers \( a \), if \( a^2 \equiv 2 \pmod{4} \), then \( 1 \neq 2 \). **Question 53**: The negation of #51 is true. **Question 54**: The negation of #52 is true. **Question 55**: The converse of #51 is true. **Question 56**: The converse of #52 is true. **Question 57**: The contrapositive of #51 is true. **Question 58**: The contrapositive of #52 is true. **Question 59**: The contrapositive of #52 is true.
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