Q3 Use Principle of Mathematical Induction to show that for all n EN, an = 2"+2. 52n+1 + 3n+2 . 22n+1 is divisible by 19.

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Question
Let x + y + z = 5 where x, y, z E R. Prove that
x² + y? +
3
Q2
Prove that if A C C,BCC, and (C \ A) C B, then C = AUB.
Q3 Use Principle of Mathematical Induction to show that for all n E N,
an = 2"+2 . 52n+1 + 3n+2 . 2²n+1 is divisible by 19.
Q4
Let p be a prime number such that p> 2. Use the proof by contradiction to show that at least
one of numbers p – 1 and p + 1 is divisible by 4.
Consider a function f : R → R given by f(x) = 2x · |x| + 3.
1. Show that f is injective;
2. Show that f is surjective.
|Let a and b be two integers such that gcd(a, b) = 2. What is gcd(7a + 5b, 3a + 2b)? Show
'your work.
Transcribed Image Text:Let x + y + z = 5 where x, y, z E R. Prove that x² + y? + 3 Q2 Prove that if A C C,BCC, and (C \ A) C B, then C = AUB. Q3 Use Principle of Mathematical Induction to show that for all n E N, an = 2"+2 . 52n+1 + 3n+2 . 2²n+1 is divisible by 19. Q4 Let p be a prime number such that p> 2. Use the proof by contradiction to show that at least one of numbers p – 1 and p + 1 is divisible by 4. Consider a function f : R → R given by f(x) = 2x · |x| + 3. 1. Show that f is injective; 2. Show that f is surjective. |Let a and b be two integers such that gcd(a, b) = 2. What is gcd(7a + 5b, 3a + 2b)? Show 'your work.
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