Q.

Let An,(nN)be a matrix of order (2n1)×(2n1),such that aij=0ijand aij=n2+i+12n,i=jwhere aij denotes the element of ith row and jth column of An.

 Let Tn=-1n·sum of all the elements of An 

Find the value ofn=1102Tn520200, where [.] represents the greatest integer function.

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

answer is 2.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

aij=0ij and aij=(n1)2+ii=j
Sum of all the element of An=i=12n1(n1)2+i
=(2n1)(n1)2+(2n1)n=2n33n2+3n1=n3+(n1)3
 So, Tn=(1)nn3+(n1)3=(1)nn3(1)n1(n1)3=VnVn1
n=1102Tn=n=1102VnVn1=V102V0=(102)3
n=1102Tn520200=2

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon