Which term of the A.P. \frac{-11}{2}, -3, \frac{-1}{2}, \ldots is \frac{49}{2}?... | VSA 2m | Maths | SuperPadhai

Arithmetic Progressions > Question

VSA2 marksYear: 2022EasyCBSE Class 10

arithmetic-progressionsnth-term

Question

Which term of the A.P.

\frac{- 11}{2}, - 3, \frac{- 1}{2}, \dots

is

\frac{49}{2}

?

Solution

1

Here

a = \frac{- 11}{2}

,

d = \frac{5}{2}

,

a_{n} = \frac{49}{2}

+0.5 marks

2

\frac{49}{2} = \frac{- 11}{2} + (n - 1) \times \frac{5}{2}

+0.5 marks

3

\Rightarrow n = 13

+1 mark

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