ONE
    Númas
    ← Back to the programme
    IBEasySequences10–12

    Sigma Notation

    Notação Sigma

    Evaluate: ∑r=14(2r+1)\sum_{r=1}^{4} (2r + 1).

    Substitute r=1,2,3,4r = 1, 2, 3, 4 and add the results.

    Solution

    Step 1 of 5

    1. 1.r=1r=1: 2(1)+1=32(1) + 1 = 3