Gp

AIEEE 2015 Tutorials › Algebra questions › Gp

If a,b,c,d are in Gp and a^x=b^y=c^z=d^u,then x,y,z,y are in --

A. AP
B. GP
C. HP
D. none of these

#Mathematics #Algebra

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7 Answers

39

Dr.House ·2009-05-31 19:17:19

these are standard and simple problems. i think u should be trying yourself and must get without any trouble watso ever.

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11

Gone.. ·2009-05-31 21:48:17

@b555-these are damn simple problems.. the problem is my ans is C and d ans given is B... pls try n c what u r getting.

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39

Dr.House ·2009-05-31 21:57:14

ok do u want substitution method?

chalega kya?

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11

Gone.. ·2009-05-31 21:58:27

1st tell me what ans u got -- b or c ??

If its B,,koi bhi method chalega

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39

Dr.House ·2009-05-31 22:04:58

x,y,z are in GP. thats waht i am getting.

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1

b_k_dubey ·2009-07-24 03:25:47

x,y,z,u are coming in HP

2¹ = 4^1/2 = 8^1/3 = 16^1/4 (exponents are in HP)

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62

Lokesh Verma ·2009-07-24 03:37:02

a^x=b^y=c^z=d^u=k let

Take log

x log a = y log b = z log c = u log d = log k

also do you remembver that if a, b, c and d are in GP

log a, log b, log c, log d are in AP

thus,

x=log k / log a etc are in HP :)

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