Find the sum: 1. 2 + 7 + 12 + 17 + to 19 terms​

Question

Find the sum:
1. 2 + 7 + 12 + 17 +
to 19 terms​

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Mary 1 month 2021-08-17T10:04:04+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-17T10:05:45+00:00

    If 2+7 =9
    And 12+17=29
    Then 22+27=49
    And so on do this 9 times we will have
    9+29+49+69+89+109+129+149+169=801
    Then add only 92 you will have 893 the answer

    0
    2021-08-17T10:05:56+00:00

    Answer:

    The sum of the given ap is 893

    Step-by-step explanation:

    Here…a=2 and d=5

    L=2+(19-1)5

    =2+18×5

    =92

    Sum=n/2(a+1)

    =9/2(2+92)

    =19×94/2

    =893

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