a) 3 2. Let a=7,d=3 ,n=8,then the value of a n is a)25 b)27 c)20 d)28​

Question

a) 3
2. Let a=7,d=3 ,n=8,then the value of a n is
a)25
b)27
c)20
d)28​

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Ximena 4 weeks 2021-09-22T22:08:53+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-22T22:10:06+00:00

    \huge{\blue{\boxed{\green{\underline{\orange{\mathbb{Question✩}}}}}}}

    a=7, d=3, n=8 find an term of A.P

    a)25

    b)27

    c)20

    d)28

    \bold{\huge\pink{\boxed{{{Answer (d)➺ 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

    0
    2021-09-22T22:10:36+00:00

    Answer:

    28

    Step-by-step explanation:

    1. a n = a+(n-1)d
    2. a n = 7+(8-1)3
    3. a n = 7+7×3
    4. a n = 7+21
    5. a n = 28

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