Question

In an AP, if d = -4 n =7,an = 4 then find a.

Answer 1

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Answer 2

Answer:

a = 28

Step-by-step explanation:

Given :$d = -4\\ n =7\\a_n = 4$

To Find : Find a

Solution:

Formula of nth term = $a_n=a+(n-1)d$

Where n is the no. of term

d is the common difference

a is the first term

Substitute the given values :

$a_n=a+(n-1)d$

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

$4=a-24$

$28=a$

Hence the value of a is 28