[(log4)^3+.(log8)^3][.(log3)^2+(log9)]=何か

[(log4)^3+.(log8)^3][.(log3)^2+(log9)]=何か

(log12)^5

log2 3·log3 4·log4 5·log5 2前は底数

log2 3·log3 4·log4 5·log5 2
=lg3/lg2*lg4/lg3*lg5/lg4*lg2/lg5
=1

Log2true3*Log3true4*Log4true5*Log5true2

可以化:-lg3/lg2*(2lg2/lg3)*(lg5/2lg2)*(lg2/lg5)
約分後の結果:1

以下の簡略化のためのヘルプ:logaC*logcA.log2 3*log3 4*log4 5*log5 2

1.logaC×logcA=logaC×(1/logaC)=1
2.log2 3×log3 4×log4 5×log5 2
=[1/(log3 2)]×2log3 2×[1/(log5 4)]×log5 2
=2×[1/2(log5 2)]×log5 2
=2×(1/2)
=1

簡略化(log4(3)+log8(3))(log3(2)+log9(2))

(log4(3)+log8(3)(log3(2)+log9(2))
=(lg3/lg4+lg3/lg8)(lg2/lg3+lg2/lg9)
=5lg3/6lg2X3lg2/2lg3
=5/6X3/2
=5/4

log3(4)*log4(5)*log5(8)*log8(9)の結果は?

=(lg4/lg3)(lg5/lg4)(lg8/lg5)(lg9/lg8)
=2