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3 May, 21:43

Calcula: t15 + t25 Si se sabe que: 26; 31; 36; 41; ...

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  1. 3 May, 23:02
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    242

    Step-by-step explanation:

    Here, we want to calculate t15 + t25

    Mathematically, nth term is

    a + (n-1) d

    here, a = 26 and d = 31-26 = 5

    t15 = 26 + (15-1) 5

    t15 = 26 + 70

    t15 = 96

    t25 = 26 + (25-1) 5

    t25 = 26 + 120

    t25 = 146

    t15 + t25 = 96 + 146 = 242
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