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Suppose a is a fixed real number such th...

Suppose a is a fixed real number such that `(a - x)/(px) = (a - y)/(qy) = (a - z)/(rz)`
If p,q,r, are in A.P., then prove that x,y,z are in H.P.

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A DAS GUPTA-Progression, Related Inequalities and Series-Exercise
  1. If (x+y)/(2),y,(y+z)/(2) are in HP, then x,y, z are in

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  2. If a, b, c, d be four numbers of which the first three are in AP and t...

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  3. Suppose a is a fixed real number such that (a - x)/(px) = (a - y)/(qy)...

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  4. If a,b,c,d be in G.P. and a^x=b^y=c^z=d^w, prove that 1/x,1/y,1/z,1/w ...

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  5. If three numbers are in G.P., then the numbers obtained by adding the ...

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  6. If a, b, c, are both in G.P. and H.P., Tp= 0, Tq = b, Tr= C, then a (...

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  7. If a,b,c,d,e be 5 numbers such that a,b,c are in A.P; b,c,d are in GP ...

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  8. If x,y and z are in A.P ax,by and cz in G.P and a, b, c in H.P then p...

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  9. a, b, x are in AP, a, b, y are in GP and a, b, z are in HP, then prove...

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  10. If a , b , c , are in A P ,a^2,b^2,c^2 are in HP, then prove that eith...

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  11. If x ,1,a n dz are in A.P. and x ,2,a n dz are in G.P., then prove tha...

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  12. If a, b, c, d, e be 5 numbers such that a, b, c are in AP, b, c, d, ar...

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  13. The values of xyz is 15/2 or 18/5 according as the series a, x, y, z, ...

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  14. In a A.P & an H.P have the same first term, the same last term & the s...

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  15. l, m, n are three numbers in G.P., a is the first term of an A.P., who...

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  16. Three unequal numbers are in HP and their squares are in AP. Show that...

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  17. Insert 12 arithmetic means between -3.5 and -42.5.

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  18. Insert 6 geometric means between 27 and 1/(81)dot

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  19. Find the 5th harmonic mean when n harmonic means are inserted between ...

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  20. If n A.Ms are inserted between two numbers, prove that the sum of the ...

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