Math, asked by ritish1212, 16 days ago

Find 15th term from end of the AP: 21, 42, 63, 84,... 585?

Answers

Answered by ImperialGladiator
12

Answer:

325

Explanation:

Given A.P. :—

  • 21, 42, 63, 84 . . . 585.

Find it's 15th term.

We know that,

nth term of an A.P. = a + (n - 1)d

Where,

  • a(first term) = 21
  • n(number of terms) = 15.
  • d(common difference) = 42 - 21 = 21

Substitute the values,

 \implies \: 21 + (15 - 1)21

 \implies \: 21 + (14)21

 \implies \: 21 + 304

 \implies \: 325

15th term of the A.P. is 325.

__________________________

Formula :

  • nth term of an A.P. = a + (n - 1)d.

Where,

  • a denotes the first term.
  • n is the number of terms.
  • d is presented as the common difference.
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