Discover the answers you need at Westonci.ca, where experts provide clear and concise information on various topics. Ask your questions and receive accurate answers from professionals with extensive experience in various fields on our platform. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

Find the sum of the first 378 counting numbers


WITH SOLUTION

Sagot :

Step-by-step explanation:

Counting numbers are 1,2,3,4,5........,378

Here it forms an AP with a = 1, d=1, an or l=378, n=378

Sum of 378 numbers = n/2(a+l)

= 378/2(1+378)

= 189(379)

= 71631