Question

Find sum of the series 5+10+20+...0 up to 10th term.

Answer 1

Answer:

Given :-

• A = 5
• D = A2 -. A1 = 10 - 5 =5
• N = 10

To Find :-

• Find sum of the series 5+10+20+...0 up to 10th term.

We know That :-

Sn = A+ (n - 1)d

Putting all values

 Sn = 5 + ( 10 -1 ) 5

Sn = 5 + ( 9 ) 5

Sn = 5 + 45

Sn = 50

Hence 10th term is 50 .