Is the last question correct? If not then what is the answer? (Last question is the first pic..)




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Answer:
K+1 ⇒ (K+1)² = K² +2K +1
Step-by-step explanation:
Your first answers are correct. The sum of K odd numbers is K². Replacing K with K+1 in this statement gives you ...
The sum of K+1 odd numbers is (K+1)² = K² +2K +1.