Question

In an AP, if the common difference (d) = -4 , and the seventh term (a7) = 4 , find the first term.

Answer 1

Step-by-step explanation:

tn=a+(n-1)d

t7=4

a+(7-1)d=4

sub d value

a+6X-4 =4

a-24=4

a=4+24

a=28

I hope so it's correct..

Answer 2

Step-by-step explanation:

hope it helps u ................