Question

if the 8th term of an ap is 25 find the first term is
a)310 b)350 c)375 d)400​

Answer 1

Given:

t8=25

to find:

first term(a)

solve:

t8=25

a+(n-1)d=25

a+(15-1)d=25

a+14d=25

after this you need to give common difference (d)

then only we can find the value of a