Question

Example 2. Find the sum of
1² +2²+ 3² +4² +5² +6²+72+82 +9² +10²
(1) 285 (2) 385
(3) 485 (4) 585​

Answer 1

Answer:

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Example 2. Find the sum of

1² +2²+3² +4² +5² +6²+72+82 +9² +10²

(1) 285

(2) 385 ✓✓✓✓

(3) 485

(4) 585

Step-by-step explanation:

${1}^{2} = 1\\ {2}^{2} = 4 \\ {3}^{2} = 9 \\ {4}^{2} = 16 \\ {5}^{2} = 25 \\ {6}^{2} = 36 \\ {7}^{2} = 49 \\ {8}^{2} = 64 \\ {9}^{2} = 81 \\ {10}^{2} = 100$

$1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100 \\ = 385$