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(Solved): Please Answer all of it! Question 3. (2 points) Consider the statement \( Q_{n}: n^{2}+5 n+3 \) is ...



Please Answer all of it!Question 3. (2 points) Consider the statement \( Q_{n}: n^{2}+5 n+3 \) is an even integer where \( n \in N \). It can be show

Question 3. (2 points) Consider the statement \( Q_{n}: n^{2}+5 n+3 \) is an even integer where \( n \in N \). It can be shown that if \( Q_{n} \) is true, then \( Q_{n+1} \) is also true. What can you say about the truth value of \( Q_{n} \) for arbitrary \( n \in \) N? Briefly justify your answer. Question 4. (11 points) Provide a proof using Mathematical Induction of the following statement: For all \( n \in N, 2^{1}+2^{2}+2^{3}+\cdots+2^{n}=2^{n+1}-2 \) You are only required to provide careful details of the inductive hypothesis and inductive step.


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Answer :- 3. Qn=n2+5n+3 is an even integer when n?N. Let , Qn is true then n2+5n+3 is an even integer . ?n2+5n+3=2k……(1) for some k?Z. Now , Qn+1=(n+1
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