Home
Class 12
MATHS
Let T(r ) be the rth term of an A.P. who...

Let `T_(r )` be the rth term of an A.P. whose first term is a and common difference is d. If for some positive integers, `m,n,mcancel(=)n, T_(n) = ( 1)/( n ) ` and `T_(n) = ( 1)/( m)` , then a -d equals `:`

A

0

B

1

C

`(1)/( mn)`

D

`(1)/( m ) +( 1)/( n )`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SEQUENCES AND SERIES

    MODERN PUBLICATION|Exercise MCQ ( Level-II)|77 Videos

  • SEQUENCES AND SERIES

    MODERN PUBLICATION|Exercise LATEST QUESTIONS|11 Videos

  • RELATIONS

    MODERN PUBLICATION|Exercise RCQS|6 Videos

  • SETS

    MODERN PUBLICATION|Exercise Recent Competitive Questions (RCQs)|6 Videos

Similar Questions

Explore conceptually related problems

Let T_(r ) be the rth term of an A.P. for r = 1,2,3, "…………….." If for some positive integers m,n we have T_(m) = ( 1)/( n ) and T_(n) = ( 1)/( m ) , then T_(mn) equals :

Let T_(r ) be the rth term of an A.P. for r = 1,2,3, "………." . If for some positive integers m,n we have : T_(m) = ( 1)/( n) and T_(n) = ( 1)/(m) , then T_(mn ) equals :

The sum of the n terms of an AP is 2n^(2)+5n and its common difference is 6, then its first term is

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

Find the sum of first 20 terms of an AP whose nth term is a_(n) = 2-3n .

The first term of an AP is a and the n^(th) term is b, the d=

Find the sum to n terms of the A.P., whose k^("th") term is 5k + 1.

Write first four terms of the A.P, when the first term a and the common difference d are given as follows : a = -1, d = (1)/(2)

Write first four terms of the A.P, when the first term a and the common difference d are given as follows : a = -1.25, d = 0.25

Write the first term of the sequence, whose nth term is a_n=(n)/(n+1) .