Register
PLSSSSS HELP ME, Write a formula for the sum of the first three terms, a1+a2+a3, Your answer should only include variables a1 and d. btw, term 1=a1 common difference=d
220k views
1 vote
PLSSSSS HELP ME, Write a formula for the sum of the first three terms, a1+a2+a3, Your answer should only include variables a1 and d.

btw,
term 1=a1
common difference=d

User Douglas Fornaro
by
4.8k points

1 Answer

0 votes
S3= 3/2 [2a1+(3-1)d]
User Mousavian
by
4.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.6m questions

5.9m answers

Other Questions

The school that Micaela goes to is selling tickets to an annual dance competition. On the first day of ticket sales the school sold 7 senior citizen tickets and 8 student tickets for a total of $115. The
Help easy for you but not for me!
How many downloads did song 1 have at minute 3?
The Pythagorean Theorem is an equation that helps you to find the lengths of a right triangle. The legs are given as a and b while the hypotenuse is labeled in the theorem's formula: a2+b2=c2 If you know
GIVING 15 POINTS!!!!!!! Jose is going to the store to buy candles. Small candles cost $3 each and large candles cost $5 each. He needs to buy at least 25 candles, and he can spend no more than $120. Which
Link Copied!