Question

Formula of arithmetic progression and geometric progression

Answer 1

Answer:

formula Of AM And GM

Am= a+b÷2

gm=√ab

Answer 2

Answer:

For AP :-

Tn = a + (n - 1)d

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

For GP :-

Tn = ar^(n-1) { 'a' into 'r' raised to 'n-1' }

Sn = a(1 - r^n)/(1 - r) when, r < 1

= a(r^n -1)/(r - 1) when, r > 1

S (To infinity) = a/ 1 - r , r < 1