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Evaluate the summation below.

2sum_(i=0)^(3)(3i-3i^(2))
Answer:

Evaluate the summation below.\newline2i=03(3i3i2) 2 \sum_{i=0}^{3}\left(3 i-3 i^{2}\right) \newlineAnswer:

Full solution

Q. Evaluate the summation below.\newline2i=03(3i3i2) 2 \sum_{i=0}^{3}\left(3 i-3 i^{2}\right) \newlineAnswer:
  1. Write Series Expression: Write down the series to be evaluated.\newlineWe need to evaluate the summation of the series given by the expression 2×i=03(3i3i2)2 \times \sum_{i=0}^{3} (3i - 3i^2). This means we will calculate the sum for each value of ii from 00 to 33, multiply each term by 22, and then add up all the terms.
  2. Calculate Series Terms: Calculate the terms of the series for each value of ii.
    For i=0i = 0: 2×(3×03×02)=2×(00)=02 \times (3\times0 - 3\times0^2) = 2 \times (0 - 0) = 0
    For i=1i = 1: 2×(3×13×12)=2×(33)=02 \times (3\times1 - 3\times1^2) = 2 \times (3 - 3) = 0
    For i=2i = 2: 2×(3×23×22)=2×(612)=122 \times (3\times2 - 3\times2^2) = 2 \times (6 - 12) = -12
    For i=3i = 3: 2×(3×33×32)=2×(927)=362 \times (3\times3 - 3\times3^2) = 2 \times (9 - 27) = -36
  3. Add Terms: Add up all the terms calculated in Step 22.\newlineSum = 0+01236=480 + 0 - 12 - 36 = -48
  4. Final Answer: State the final answer.\newlineThe sum of the series is 48-48.

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