Question

in an ap if b=-4,n=7,an=4 then find 'a'​

Answer 1

Answer:⟹a=28

Step-by-step explanation:We know, a

n

​

=a+(n−1)d

Putting the value given, we get

4=a+(7−1)(−4)  or  a=4+24

⟹a=28

Answer 2

Answer:

a =28

Step-by-step explanation:

Given,

d = -4

n = 7

an = 4

an = a + (n-1)d

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

4 = a + 6(-4)

4 = a + (-24)

4 + 24 = a

28 = a