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If "log"(x) (4x^("log"(5)x) + 5) = 2 "lo...

If `"log"_(x) (4x^("log"_(5)x) + 5) = 2 "log"_(5)x`, then x equals to

A

`4, 5`

B

`-1, 5`

C

`4, -1`

D

`5, (1)/(5)`

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The correct Answer is:
D
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OBJECTIVE RD SHARMA ENGLISH-LOGARITHMS-Exercise
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  4. The equation "log"(e)x + "log"(e)(1+x) =0 can be written as

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  5. If a =log3(5) and b =log17( 25), which one of the following is correct...

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  7. The value of "log"(2)"log"(2)"log"(4) 256 + 2 "log"(sqrt(2))2, is

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  8. loga/(y-z)=logb/(z-x)=logc/(x-y) then value of abc=

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  9. If "log"(2) 7 = x, then x is:

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  10. If 2^((3)/("log"(3)x)) = (1)/(64), then x =

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  11. If a = 1 + log(x) yz, b = 1 + log(y) zx and c = 1 + log xy where x, ...

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  12. If (logx)/(a^2+a b+b^2)=(logy)/(b^2+b c+c^2)=(logz)/(c^2+c a+a^2), the...

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  13. If log(2a-3b)=loga-logb, then a=

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  14. If ("log"3)/(x-y) = ("log"5)/(y-z) = ("log" 7)/(z-x), " then " 3^(x+y)...

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  15. ("log"(2)a)/(3) = ("log"(2)b)/(4) = ("log"(2)c)/(5lambda) " and " a^(-...

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  16. if loga/(b-c)=logb/(c-a)=logc/(a-b) then find the value of a^ab^bc^c

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  18. if a^2+4b^2=12ab, then log(a+2b)

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  19. Find the value of 7 log(16/15) + 5 log (25/24) + 3 log (81/80).

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  20. If 1/2logx+1/2logy+log2=log(x+y) then :

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