Question

If a = 7 , d = 3 , n = 8 find the value of an

Answer 1

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If a = 7 , d = 3 , n = 8 find the value of an.

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Answer:

$\bold{\huge\pink{\boxed{{{ANSWER ➺ 28}}}}}$

STEP BY STEP SOLUTION :-

$\huge \mathcal \color{maroon}{Given :-}$

$\\ a \: = 7 \\ d = 3 \: \: \\ n = 8 \:$

$\huge \mathcal \color{maroon}{To find :-}$

${}^{a}n = ?$

$\huge \mathcal \color{maroon}{Solution :-}$

${}^{a} n = a + (n - 1)d \\ (by \: putting \: the \: value \: of \: a,d \: and \: n) \\ ⟹7 + (8 - 1)3 \\ ⟹7 + (7 \times 3) \\ ⟹7 + 21 \: \: \: \: \: \: \\ ⟹an=28 \: \: \: \: \: \: \: \: \: \:$

$\huge \mathcal \color{maroon}{Information :- }$

$Here, \: \\ \: \: ➯ \: a=1st \: term \: of \: \: AP \\ ➯ \: d = common \: diffrence \\ ➯ \: n = number \: of \: terms \\ ➯ \: {}^{a} n = last \: term \\ ➯ \: formula \: used = a + (n - 1)d$