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Let T, be the rth term of an A.P. for r ...

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

A

`(mn)^(-1)`

B

`m^(-1)+n^(-1)`

C

1

D

0

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The correct Answer is:
C
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PUNEET DOGRA-SEQUENCE AND SERIES-PREVIOUS YEAR QUESTIONS
  1. If a,b,c are in AP or GP or HP. Then (a-b)/(b-c) is equal to:

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  2. If the second term of GP is 2 and the sum of its infinite terms is 8, ...

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  3. Let T, be the rth term of an A.P. for r = 1, 2, 3 … if the some positi...

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  4. The sum of the series 3-1+(1)/(3)-(1)/(9)+ . . . .oo Is equal to: (a...

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  5. If an infinite GP has the first term x and the sum 5, then which one o...

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  6. The third term of a GP is 3. what is the product of the first 5 terms ...

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  7. What is the sum of all two digit numbers which when divided by 3 leave...

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  8. If x, 3/2, z are in AP, x, 3, z are in GP, then which of the following...

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  9. If x=1-y+y^(2)-y^(3)+ up to infinite terms where |y| lt1, then which o...

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  10. If the ratio of AM to GM of two positive numbers a and b is 5:3, then ...

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  11. The value of the product: 6^((1)/(2))xx6^(1/4)xx6^(1/8)xx6^(1/(16))xx....

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  12. If S(n)=nP+(n(n-1)Q)/(2), where S(n) denotes the sum of the first term...

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  13. If y=x+x^(2)+x^(3)+. . . Up to infinite terms, where x lt1, then whic...

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  14. A person is to count 4500 notes. Let a(n) denote the number of notes t...

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  15. If 1.3+2.3^(2)+3.3^(3)+ . . .=n3^(n)=((2n-1)3+b)/(4), then a and b are...

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  16. Let f(n) = [(1)/(2) + (n)/(100)] where [n] denotes the integral part o...

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  17. The fifth term of an AP of n terms, whose sum is n^(2)-2n, is:

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  18. The sum of all the two-digit odd numbers is: (a)2475 (b)2530 (c)490...

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  19. Sthe sum of the roots of the equation x^(2)+bx+c=0 (where b and c are ...

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  20. The sum of the roots of the equation ax^(2)+x+c=0 (where a and c are n...

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