Question

find the sum of the following A.P.S 0.6, 1.7, 2.8.....to 100 terms​

Answer 1

Answer:

Here a = 0.6

n = 100

and d = 1.7 - 0.6 = 1.1

we know that sn = n/2 {2a + (n-1)d }

= 100/2 {2×0.6 +(100 -1) 1.1}

= 50 { 1.2 + 99 × 1.1 }

= 50 { 1.2 + 108.9}

= 50 × 110.1

= 5505