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A.P. = 3,8,13........253 Find last 20th …

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A.P. = 3,8,13........253 Find last 20th term..?

    • Posted by Pachu Sona 6 years ago

    CBSE > Class 10 > Mathematics
    • 4 answers

    Anshul Kumar Parira 6 years ago

    As it is given from laat so, a=253 d= (-5) a20 = ? an a+(n-1)d a20= 253+(20-1)(-5) = 253+(19)(-5) =253-95 158 Therefore 20th term of an AP from last is 158

    0Thank You

    Arpit Maurya 6 years ago

    Write this in given form 253.......13,8,3 Here, a= 253 and d=8-3 =-5 An = 253+(20-1)(-5) =253 +19*(-5) = 253-95 = 158

    0Thank You

    Yogita Ingle 6 years ago

    3,8,13.......,253
    To find 20th term form the last term we consider the sequence as follows
    a = 253 and d = 3 - 8 = -5
    an = a + (n - 1)d
    a20 = a + (20 - 1)d
          = 253 + 19 × (-5)
          = 253 - 95
          = 158
    Hence, the 20th term from the last term is 158.

    0Thank You

    Aviral Goyal 6 years ago

    158

    0Thank You

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