Westonci.ca is the ultimate Q&A platform, offering detailed and reliable answers from a knowledgeable community. Explore a wealth of knowledge from professionals across various disciplines on our comprehensive Q&A platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

Find the 21st term in the following
arithmetic sequence :
-1, -3, -5, -7, ...
Hint: Write a formula to help you.
1st term + common difference (desired term - 1)