Question

For an arithmetic progression the first term is a and common difference is d sum of mth term and nth term is??
With solving pls

Answer 1

Answer:

2a + d( m+n-2)

Step-by-step explanation:

mth term = a+ (m-1)d

nth term = a + (n-1)d

Sum = a+ (m-1)d + a + (n-1)d

= 2a + d( m+n-2)