Question

sum of n terms of Ap
formula​

Answer 1

Answer:

sum of n terms of an ap is given as follows

= n/2(2a+(n-1) d)

or

n(a+l) l2

Answer 2

Answer:

$t(n) = a \: + (n - 1)d \\ \\ here \: t(n) \: is \: lst \: term \: \\ \\ \: a \: = first \: term \: \\ d \: = commm \: diff. \\ n \: = no \: . \: of \: term$