Question

in airthmetic progestion d=-4 n=7 an=4

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Answer 1

Answer:

this is ur answer

Step-by-step explanation:

hope it helps you

Answer 2

Step-by-step explanation:

$\huge\boldsymbol {\underline{\blue{Solution:-}}}$

$\huge\bullet \boldsymbol{Formula \: \: Used:-}$

$\huge \star \green{a_n= a+(n-1)d}$

Here

• an = 4
• n=7
• d= -4

To Find :

Have to first term of AP

Answer:

$\sf \longrightarrow \pink{4 = a + (7 - 1) - 4}$

$\sf \longrightarrow \pink{4 = a + (- 24)}$

$\sf \longrightarrow \pink{4 = a - 24}$

$\sf \longrightarrow \pink{a = 4 + 24}$

$\sf \longrightarrow \pink{a = 28}$

Verification:

$\sf \longrightarrow \purple{4 = 28(7 - 1) - 4}$

$\sf \longrightarrow \purple{4 =28 - 24}$

$\sf \longrightarrow \purple{4 =4}$