Find the sum of first twenty terms of Ar...

Find the sum of first twenty terms of Arithmetic series 2 +7+12 + `cdots ` using suitable formula.

Verified by Experts

The correct Answer is:

`10xx99 " " S_(20)=990`

ARITHMETIC PROGRESSIONS
CPC CAMBRIDGE PUBLICATION|Exercise EXERCISE 1.2|13 Videos
ARITHMETIC PROGRESSIONS
CPC CAMBRIDGE PUBLICATION|Exercise EXERCISE 1.3|27 Videos
CIRCLES
CPC CAMBRIDGE PUBLICATION|Exercise EXERCISE 4.2|13 Videos

Similar Questions

Explore conceptually related problems

Find the sum first 'n' terms of the series (3+7+13+21+31+..) ?

Find the sum to n terms of the series 5+ 11 + 19 + 29+ 41+ ……

Find the sum to n terms of the series , 5+11+19+29+41…

Write the formula to find the sum of first n terms of an Arithmetic progression, whose first term is a and the last term is a_n .

Sum to n terms of the series 2+6+12+20+.. is,

Find the sum of n terms of the series 1+4/5+7/(5^2)+10/(5^3)+dot

Find the sum upto n terms of the series 1+4+7+10+13+16+"...." .