find the 20th term of the last term of the AP 3 8 13-253 ​

Question

find the 20th term of the last term of the AP 3 8 13….253

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Sarah 1 month 2021-08-12T13:42:08+00:00 2 Answers 0 views 0

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    0
    2021-08-12T13:43:21+00:00

    Answer:

    we have to find a20 so,

    here a1= 3. d= 8-3=5

    an=a +n-1(d)

    253=8+n-1(5)

    253-8=5n-5

    245+5=5n

    n=250÷5=

    =50

    so a20=a+19d

    =3+19(5)

    =98

    0
    2021-08-12T13:43:48+00:00

    Answer:

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18:9+8+9*3-7:3-1*13 = ? ( )