Respuesta :

Answer:

30

Step-by-step explanation:

Substitute j = 1, 2, 3, 4, 5 into 2j and sum, that is

sum = (2 × 1) + (2 × 2) + (2 × 3) + (2 × 4) + (2 × 5)

       = 2 + 4 + 6 + 8 + 10 = 30

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