4. The first and last term of an A.P. are – 4
and 146. The sum of terın is 7171. The
number of terms is
(A) 1

By Anna

4. The first and last term of an A.P. are – 4
and 146. The sum of terın is 7171. The
number of terms is
(A) 100
(B) 101
(C) 102
(D) 99

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Anna

1 thought on “<br />4. The first and last term of an A.P. are – 4<br />and 146. The sum of terın is 7171. The<br />number of terms is<br />(A) 1”

  1. Answer:

    Given that,

    a1 = -4, aN = 146

    And Sn = 7171

    We want to find number of terms (. i. e., n)

    Sn = n/2 ( aN + a1)

    7171 = n/2 ( 146 – 4)

    7171 = n/2 × 142

    7171 = n × 71

    n = 7171 / 71

    n = 101

    I hope this will help u. Please add this to the brainlist and give some thanks.

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