Question

For an given A.P t7=4,d =-4then find a

Answer 1

Answer:

Step-by-step explanation:

A7=4

D=-4

A7= a+6d

4= A + 6*-4

4=a+(-24)

4+24=a

A=28

Answer 2

Answer:

Step-by-step explanation:

t7=a+(7-1)*(-4)

t7=a+(6)*(-4)

t7=a-24

Now according to question

4=a-24

a=28