Question

which term of A. P. 21,42,63.......is 231?​

Answer 1

Step-by-step explanation:

lo bhai 11 th term hoga iska answer

Answer 2

Given :

• a = 21
• d = 42-21 =21
• a_n = 231

To Find :

• nth term

Solution :

$\longmapsto\tt{{a}_{n}=231}$

Using Formula :

$\longmapsto \boxed{ \tt{a_{n} = a + (n - 1) \times d}}$

Putting Values :

$\longmapsto\tt{231=21+(n-1)\times{21}}$

$\longmapsto\tt{231={\cancel{21}}+21n{\cancel{-21}}}$

$\longmapsto\tt{231=21n}$

$\longmapsto\tt{n=\cancel\dfrac{231}{21}}$

$\longmapsto\tt\bold{n=11}$

So , 11 is the nth term...

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Arithmetic Progession :

An Arithmetic Progession (AP) is a list of numbers im which each term is obtained by adding a fixed number d to the proceeding term,except the first term.

• The fixed number d is the common difference..

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