Question

how many terms of series -2+2+6+10.. so that their sum is 1680​

Answer 1

Step-by-step explanation:

let the number be x

-2+2+6+10+x=1680

-2+18+x=1680

16+x=1680

x=1680-16

x=1664

so, it is very important to you

hope you are understand

Answer 2

Answer:

part of the Swachhata hi Seva campaign being organised from September 11 to October 2, schools students are writing a letter to Mahatma Gandhi on their commitment to cleanliness on September 13 which has been designated as 'Letter Writing Day'. The top letters will be awarded on a national level.

Step-by-step explanation:

part of the Swachhata hi Seva campaign being organised from September 11 to October 2, schools students are writing a letter to Mahatma Gandhi on their commitment to cleanliness on September 13 which has been designated as 'Letter Writing Day'. The top letters will be awarded on a national level.