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Find the number of positive integers whi...

Find the number of positive integers which have the characteristics 3 when the base of the logarithm is 7.

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ALLEN -LOGARITHMS-All Questions
  1. Given a^2+b^2=c^2, a >0 ; b >0; c >0,\ c-b!=1,\ c+b!=1,\ prove that ...

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  2. Given (log)(10)34. 56=1. 5386 ,\ find (log)(10)3. 456 ;(log)(10)0. ...

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  3. Find the number of positive integers which have the characteristics 3 ...

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  4. If (log)(10)2=0. 3010\ &(log)(10)3=0. 4771.\ Find the value of (log...

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  5. If log(10)2=0.3010 ,\ log(10)3=0.4771. Find the number of integers in ...

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  6. Find the antilogarithm of 0.75 if the base of the logarithm is 2401.

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  7. If x ,y >0,(log)y x+(log)x y=(10)/3 and x y=144 , then (x+y)/2=sqrt(...

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  8. let y=sqrt(log2(3)log2(12)log2(48)log2(192)+16)-log2(12)log2(48)+10fin...

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  9. If x=1+(log)a b c , y=1+(log)b c a and z=1+(log)c a b , then prove ...

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  10. A rational number which is 50 times its own logarithm to the base 10, ...

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  11. Prove that a^x-b^y=0 where x=sqrt((log)a b), y=sqrt((log)b a), a >0, b...

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  12. If ((log)a N)/((log)c N)=((log)a N-(log)b N)/((log)b N-(log)c N), wher...

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  13. If (log)b a(log)c a+(log)a b(log)c b+(log)a c(log)bc=3 (where a , b , ...

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  14. Prove that (log)7 10 is greater than (log)(11)13.

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  15. Solve the system the equations (a x)^(loga)=(b y)^(logb); b^(logx)=a^(...

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  16. Solve for x :(log)5 120+(x-3)-2.(log)5(1-5^(x-3))=-(log)5(0. 2-5^(x-4)...

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  17. Solve the equation for x : log4+(1+1/(2x))log3=log(3^(1/x)+27)

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  18. Find the real solutions to the system of equations log(10)(2000xy)-log...

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  19. Find the x satisfying the equation log^2(1+4/x)+log^2(1-4/(x+4))=2lo...

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  20. Solve for x:\ log^2 (4-x)+log(4-x)*log(x+1/2)-2log^2(x+1/2)=0

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