Question

in arithmetic progress,if d=-4,n=7,an=4 then find a​

Answer 1

Answer:

$d \: = - 4 \\ n = 7 \\ \\ tn = 4$

$tn = a + (n - 1d$

$4 = a + (7 - 1) - 4$

$4 = a - 24$

$a = 28$

Answer 2

Answer:

we know that =>

$a_{n} = a + (n - 1)d$

on putting values =>

=> 4 = a + (7-1)(-4)

=> 4= a + (-24)

=> 28 = a

hence A = 28

Step-by-step explanation:

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