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Class 10 math (India)

Course: Class 10 math (India) > Unit 5

Lesson 3: nth term of an AP
Math
Class 10 math (India)
Arithmetic progressions
nth term of an AP
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nth term of an arithmetic progression (intermediate)

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Problem

In an arithmetic progression,
a, start subscript, n, end subscript, minus, a, start subscript, 9, end subscript, equals, 12
The common difference is 3.
Find the value of n.
n, equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
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