Mathematics
Senior High

下線が引いてある場所の変形方がわかりません

+ 2log 105 +2(1-log102) 102 +log103 +2

Answers

log₁₀5=log₁₀(10×1/2)
 =log₁₀10+log₁₀1/2
 =1+log₁₀(2)⁻¹
 =1-log₁₀2

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