Question

Athematic progressions formula

Answer 1

here is your answer

a+(n-1)d

Answer 2

HEYA MATE !

a2-a1 = a3-a2

an = a +(n-1)d

Sn= n/2 {a + a +(n-1)d}

hope it helps

pls mark it as the brainliest answer :)

GOOD LUCK FOR UR EXAMS !!