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If a,b,c are positive real number, then ...

If a,b,c are positive real number, then the least value of `(a+b+c)(1/a+1/b+1/c)` is

A

9

B

3

C

44472

D

none of these

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The correct Answer is:
A
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PATHFINDER-PROGRESSION AND SERIES -QUESTION BANK
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  2. If pth, qth, and rth term of an AP are equal to corresponding terms of...

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  3. If a,b,c are positive real number, then the least value of (a+b+c)(1/a...

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  4. An infinite GP has first term x and sum 5, then x belongs to

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  5. 2^(1/4),2^(2/8),2^(3/16),2^(4/32)......infty is equal to

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  6. Let alpha , beta be the roots of x^2-x+p=0 and gamma,delta be the root...

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  7. If f(x) is a function satisfying f(x+y)=f(x)f(y) for all x,yin N such ...

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  8. Sum of n terms of the series 8+88+888+....equals

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  9. The sum of the first n terms of the series 1^2+2.2^2+3^2+2.4^2+5^2+2.6...

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  10. The sum of integer in between 1 to 100 which is divisible by 2 or 5 is

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  11. 1/2+3/4+7/8+15/16+..... t o n terms =

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  12. 0ltthetaltpi/2, if x=sum(n=0)^inftycos^(2n)theta,y=sum(n=0)^inftysin^(...

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  13. If x in{1,2,3......9} and fn(x) =x x x ...x (n digits ), then fn^2(3)+...

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  14. Four no. are in AP . If their sum is 20 and the sum of their squares i...

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  15. Sum of n terms of series 1.3+3.5+5.7+....is

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  16. If the sum of an infinitely decreasing GP is 3, and the sum of the squ...

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  17. 1+2.2+3.2^2+4.2^3+....100.2^99 equals

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  18. If A1,A2 be two AM's and G1,G2 be the two GM's between two number a an...

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  19. If H1,H2,H3,.......Hn be n harmonic means between a and b then (H1+a)...

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  20. If a,b,c are in AP and a^2,b^2,c^2 are in HP, then

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