You are asked to prove that 12 + 22 + 32 +...+n? n(n+1)(2n+1) using the Principle of Mathematical Induction. What is the correct basis step? 1(1+1)(2-1+1) O 12 = 1 = 123 || 6. O 12 + 22 = 1 + 4 = 5 = 2-3-5 6 2(2+1)(2-2+1) 6. O 12 + 22 + 3? +...+ k² = k(k+1)(2k+1) O 12 + 22 + 3² = 1+4+9 = 14 = 3(3+1)(2-3+1) 3-4-7 |3D 6 6.

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