Put the following statements into order to prove the summation formula =(∑==+1)2 ) for all ∈ℕ. put n next to the statements that should not be used. equation editorequation editor 1. by adding +1 to both sides of we get equation editorequation editor 2. the statement is true for =1 because in that case, both sides of the equation are 1. equation editorequation editor 3. now suppose we have proved the statement for all ∈ℕ. equation editorequation editor 4. ∑=++1=∑+==+1)2++1 equation editorequation editor 5. the statement is true for =1 because in that case, both sides of the equation are 0. equation editorequation editor 6. we simplify the right side: +1)2++1=++1)=++2)2 equation editorequation editor 7. ∑=++1=∑+==+1)2++1 equation editorequation editor 8. by adding +1 to both sides of we get equation editorequation editor 9. now suppose we have proved the statement for some ∈ℕ. equation editorequation editor 10. thus, we have proved the statement +1)=(∑+==++2)2)