Question

The sum of n terms of 1.4,3.7, 5.10 is ...........Is

Answer 1

1.40

3.70

+5.10

_______

10.2

Answer 2

Answer:

Explanation:

1.4,3.7,5.10,......

Here. , a=1.4. And d= 2.3

Sum of n terms=n/2(2a+(n-1)d)

=n/2(2*1.4+(n-1)*2.3)

= 2.3n square +5n/ 2

Hopes it helps you