Question

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

Answer 1

9514 1404 393

Answer:

K+1 ⇒ (K+1)² = K² +2K +1

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.