Thank you for registering.

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

Please check your email for login details.
MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

Find the coefficient of x n in the expansion of log(1+x+x 2 )

Find the coefficient of xn in the expansion of log(1+x+x2)

Grade:12

1 Answers

Badiuddin askIITians.ismu Expert
148 Points
11 years ago

Dear

log(1+x+x2)

log (1-x3)/(1-x)

log (1-x3) - log (1-x)

case when n is a multiple of 3

coefficient of xn   is  -1/(n/3)      -(-1/n)

                                  = -2/n

 

when n is not a multiple of 3 then first term does not have a term xn

 so coefficient of xn  is -(-1/n)

                                        =1/n

Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very

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

 All the best.
 
Regards,
Askiitians Experts
Badiuddin

Think You Can Provide A Better Answer ?

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

ASK QUESTION

Get your questions answered by the expert for free