Question

th an AP, if d = 4
In an Ap, if d=-4, n=7 and an = 4 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

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

-20=a

and an AP if d=-4

an=a+(n-1) d

4=a+(7-1)×-4

4=a+6×-4

4=a-24

4+24=a

28=a

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