an = a1 + ( n − 1) d They've given me a1 = 1 and I've figured out that d = 4. Plugging these values into the formula, I can figure out how many terms there are: an = a1 + ( n − 1) d 53 = 1 + ( n − 1)

I can't believe how useful this is. Just like the similar app I am obssessed with, Shazam, for music. I like this app i tho it was fake because of other apps doest work but thank you for making this app, and really helpful and it was so hard to solved the problems.

Brandon Zimmerman

I love that it shows how to solve the problem so I can teach myself. Calculator because you have to pay for premium for any actual help but it works really well. There is an animation mode, so I can learn step by step, wide variety of types of equations it can solve.

Dan Stamey

It's actually amazing it's alot easier for me to do school work where equations are just like a building block to the rest of the problem. So with this app, I can get the assignments done. Great for making sure you got the right answer, great tutoring app for getting help if you're stuck on a math problem.

Arithmetic Series

An arithmetic series is the sum of the terms in an arithmetic sequence with a definite number of terms. Following is a simple formula for finding the sum: Formula 1: If S n represents the sum of an arithmetic sequence with terms