# write a formal proof and state witch proof style you use 1 1 + +...+ 3.4...

write a formal proof and state witch proof style you use

1 1 + +...+ 3.4 n-2 6. (5 pts.) a. What is the first n that P(n) is true? P(n): 4.5 n(n+1) 3n+3 b. (20 pts. Use mathematics induction to prove (write a formal proof). For all ne N, where n is greater than or equal to? (the answer form part a) P(n) is true, where 1 1-2 P(n): Be sure to state which of the three types of 3.4 4.5 n(n+1) 3n+3 mathematical induction you are using. 1 1 + + ... +

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