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Find the value of 7 log(16/15) + 5 log...

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

A

`"log"2`

B

`"log"3`

C

`"log"5`

D

none of these

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The correct Answer is:
A
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OBJECTIVE RD SHARMA-LOGARITHMS-Exercise
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  5. The value of (3+ "log" 343)/(2 + (1)/(2)"log" ((49)/(4)) + (1)/(3) "lo...

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  6. If "log"(30) 3 = x, "log"(30) 5 =y, "then log"(30) 8=

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  7. If "log"(a)x, "log"(b) x, "log"(c) x are in A.P., where x ne 1, "then"...

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

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  9. If 9a^2 + 4b^2 = 18ab, then log (3a + 2b) =

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  10. The value of "log"(5) (1+ (1)/(5)) + "log"(5) (1+(1)/(6)) + "log"(5...

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  11. If log(x-y)-log5-1/2logx-1/2logy=0 then x/y+y/x is equal to

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  12. If 2^("log"(10) 3sqrt(3)) = 3^(k"log"(10)2), then k =

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  13. If log10 343 = 2.5353 then the least positive integer 'n' such that 7^...

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  14. If "log"(10) 2 = 0.3010, "then log"(5) 64=

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  15. If 4^("log"(9)3) + 9^("log"(2)4) = 10^("log"(x)83), "then" x =

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  16. Find the value of 3^((4)/(log(2)9))+27^((1)/(log(49)9))+81^((1)/(log(4...

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  19. The value of ("log"(a)("log"(b)a))/("log"(b)("log"(a)b)), is

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  20. If "log"(2)x + "log"(4)x + "log"(16)x = (21)/(4), then x equals to

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