In a matrix write.
(i) the order of the matrix (ii) the number of elements,
(iii) write the elemeats `a_(13) , a_(21), a_(33), a_(24), a_(23)`.

8,A_(1),A_(2),A_(3),24.

A person is to count 4500 currency notes. Let a_(n) denote the number of notes he counts in the nth minute. If a_(1) = a_(2) = "………" = a_(10) = 150 and a_(11) , a_(12),"……….." are in an A.P. with common difference -2, then the time taken by him to count at notes is :

Find the indicated terms in each of the sequences whose n^("th") terms are: a_(n) =4n-3,a_(17) ,a_(24)

Write the first five terms of each of the sequences and obtain the corresponding series: a_(1) =a_(2) =2 , a_(n) =a_(n-1) -1, n gt 2

In a square matrix A of order 3 the elements a_(ij) 's are the sum of the roots of the equation x^(2) - (a+b) x + ab =0, a_(I,i+1) 's are the product of the roots, a_(I,i-1) 's are all unity and the rest of the elements are all zero. The value of the det (A) is equal to

Write the 5^(th) terms of the sequences whose n^(th) term is a_(n) = 2^(n) ?

Find the sum of first 24 terms of the list of numbers whose nth term is given by a_(n) = 3 + 2n

A radioactive sample S_(1) having the activity A_(1) has twice the number of nuclei as another sample S_(2) of activity A_(2) If A_(2)=2A_(1) , then the ratio of half life of S_(1) to the life of S_(2) is

Write the first 4 terms of an A.P. Where a_(n) = 4n +3 .

find the cofactor of a_(23) in [(3,1,4),(0,2,-1),(1,-3,5)]