A person is to cout 4500 currency notes. Let `a_(n)` denotes the number of notes he counts in the nth minute. If `a_(1)=a_(2)="........"=a_(10)=150" and "a_(10),a_(11),"......",` are in AP with common difference `-2`, then the time taken by him to count all notes is

A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute. If a_1=""a_2="". . . . . .""=""a_(10)=""150 and a_(10),""a_(11),"". . . . . . are in A.P. with common difference -2, then the time taken by him to count all notes is (1) 34 minutes (2) 125 minutes (3) 135 minutes (4) 24 minutes

A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute. If a_1=""a_2="". . . . . .""=""a_(10)=""150 and a_(10),""a_(11),"". . . . . . are in A.P. with common difference 2, then the time taken by him to count all notes is (1) 34 minutes (2) 125 minutes (3) 135 minutes (4) 24 minutes

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 :

A person is to count 4500 currency notes, Let a_n denote the number of notes he courts in the nth minute. If a_1=a_2= ........ = a_10 =150 and a_10, a_11 , ............ are in an A.P. with common difference -2, then the time taken by him to count all notes is :

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_3=..........=a_10=150 and a_10,a_11,......... are in an AP with common difference -2 , then the time taken by him to count all notes is :- (1) 24 minutes 10 11 (2) 34 minutes (3) 125 minutes (4) 135 minutes

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_3=..........=a_10=150 and a_10,a_11,.........are in an AP with common difference -2, then the time taken by him to count all notes is :- (1) 24 minutes 10 11 (2) 34 minutes (3) 125 minutes (4) 135 minutes

If a_(n) denotes the nth term of the AP 2, 7, 12, 17,…., find the value of (a_(30)-a_(20))

nth term of an AP is a_(n). If a_(1)+a_(2)+a_(3)=102 and a_(1)=15, then find a_(10)