## Excel in math and science

### Master concepts by solving fun, challenging problems.

## It's hard to learn from lectures and videos

### Learn more effectively through short, conceptual quizzes.

## Our wiki is made for math and science

###
Master advanced concepts through explanations,

examples, and problems from the community.

## Used and loved by 4 million people

###
Learn from a vibrant community of students and enthusiasts,

including olympiad champions, researchers, and professionals.

## Comments

Sort by:

TopNewest\(\binom{n+m-1}{n}\), where n is the power and m is the number of terms in the expression. See the multinomial coefficient and Stars and Bars

Log in to reply

find the no of terms in the expansion of (a+b+c+d)^n

Log in to reply