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17 June, 02:34

Write missing number in series - 1,_,_,_,19

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Answers (2)
  1. 17 June, 02:55
    0
    Step-by-step explanation:

    -1,-,-,-,19

    a1=-1

    n=5

    l=19

    l=a + (n-1) d

    19=-1 + (5-1) d

    19+1=4d

    4d=20d=20/4=5

    a2=-1+5=4

    a3=a2+d=4+5=9

    a4=a3+d=9+5=14

    so terms are - 1,4,9,14,19
  2. 17 June, 06:04
    0
    1,7,13,19

    Step-by-step explanation:

    you add 6
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