Math, asked by kambojsinghabhi3909, 1 year ago

In an ap,if the common difference = minus 4 and the seventh term is 4 then find the first term

Answers

Answered by likhitha77
0
then the first term of the ap is 28
Answered by Ajeesha15
0
✨✔️Question: In an AP, if the common difference is (-4) and seventh term is 4, then find the first term.

\boxed{(a)n \:= \:a + \:( n-1 )\: * \:d}

✔️✔️Answer:

Let us take n = 7
Therefore; (a)n => (a)7

Given that,
d = (-4)
(a)7 = 4

(a)7 \: = \: a \: + \: (n - 1) \: \times d

4 \: = \: a \: + \: (7 - 1) \: \times \: ( - 4)

4 \: = \: a \: + \: ( - 24)

4 \: + \: 24 \: = \: a

Therefore, a = 28.

First Term of the AP is 28.

✨✔️HOPE IT HELPS YOU....
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