Question

For given arithmetic progression t1=4 d=-4 then a=??​

Answer 1

Answer:

It is given that,

t7 =4

d=−4

Now,

tn =a+(n−1)d

t7 =a+(7−1)d

⇒4=a+6(−4)

⇒4=a−24

⇒a=4+24

⇒a=28