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Uma sequência

Uma sequência. 1. = 2x2. 4. = 3x3. 9. n i = i x i = i 2. = 4x4. 16. = 5x5. 25. Outra sequência. 1. = 1+2. 3. = 3+3. 6. n i = n i-1 + i n i = 1+2+3+…+i n i = i (i +1)/2. = 6+4. 10. = 10+5. 15. De novo os quadrados. 1. 4. 9. 16. 25. = 1+3. = 1+3+5. n i = i 2.

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Uma sequência

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  1. Uma sequência 1 = 2x2 4 = 3x3 9 ni = i x i = i2 = 4x4 16 = 5x5 25

  2. Outra sequência 1 = 1+2 3 = 3+3 6 ni = n i-1 + i ni = 1+2+3+…+i ni = i (i +1)/2 = 6+4 10 = 10+5 15

  3. De novo os quadrados 1 4 9 16 25 = 1+3 = 1+3+5 ni = i2 = 1+3+5+7 = 1+3+5+7+9

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