help@askiitians.com

+91-87964 74404

Grade 11Algebra

how to derive the formula for number of surjections possible in a relation? formula being:- n sigma (-1)^(n-r).nCr.(r)^n r=0

Akash Kumar Dutta

13 Years agoGrade 11

1 Answer

Arun Kumar

12 Years ago

Hi

See you're not able to express your doubt but anyways probably by following formulae.

$\sum_{j=0}^n (-1)^j\tbinom n j P(n-j) = n!a_n$

$\sum_{j=0}^n (-1)^j\tbinom n j P(m+(n-j)d) = d^n n! a_n$

Thanks & Regards, Arun Kumar, Btech,IIT Delhi, Askiitians Faculty

What is a binomial expression?

algebra

1 Answer Available

Last Activity: 2 Years ago

Can we divide two vectors? If this is possible then how?

algebra

1 Answer Available

Last Activity: 2 Years ago

How do you write “the product of 18 and q” as an algebraic expression?

algebra

1 Answer Available

Last Activity: 2 Years ago

दहावीच्या आय सी एस इ विद्यार्थ्यांनी पुढे काय करायला पाहिजे

algebra

1 Answer Available

Last Activity: 3 Years ago

Find the least number of square tiles by which the floor of a room of dimensions 16.58 m and 8.32 m can be covered completely. why HCF and not LCM as “least” keywor dis given?

algebra

1 Answer Available

Last Activity: 3 Years ago

View all Questions