Question

in an Ap if d=-2,n=5and an =0.find the value of a.​

Answer 1

Answer:

a = 8

Step-by-step explanation:

Given

In an A.P.

(common diff.) d = -2

(no. of terms) n = 5

nth term (an) = 0

To Find

First term(a)

Solution

we know that

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

$0 = a+(5-1)(-2)$

$0 = a+(4)(-2)$

$0 = a -8$

$a = 8$

Answer 2

a=8

Step-by-step explanation:

an=a+{n-1}d

0=a-8

a=8