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

∑ { 2r } =? {1-r 2 +r 4 } Note: the sigma Sign is both for numerator and Denominator.

∑ {   2r    } =?
   {1-r2+r4}
Note: the sigma Sign is  both for numerator and Denominator.
 
 

Grade:11

1 Answers

Abhishek Singh
93 Points
6 years ago
hey its easy
factorise the denominator as (r2-r+1)(r2+r+1). now see the diff. of these terms is 2r so you can split the summation.and solve it

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