Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping

permutaions n combinations where to apply coefficient of (x1+x2+x3+......) and how

permutaions n combinations 

where to apply coefficient of (x1+x2+x3+......) and how


1 Answers

jitender lakhanpal
62 Points
9 years ago

Dear siva,

we use multimonial theorom in permutation and combination in two cases

1) when we have to find number of ways of dividing n identical items among r persons then we will find the coefficient

of xr in the expansion of (1+x +x+x3 ........ xn)r

 2)when there are m items of one kind and n items of other and so on then number of ways of choosing r items out of these items is

    coefficient of x in the expansion   (1+x +x2 ........................xn)(1+x +x........................xm)   and so on



We are all IITians and here to help you in your IIT JEE preparation.

Now you can win by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar : Click here to download the toolbar.. 


Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy


Get your questions answered by the expert for free