log2(25)乘log3(4)乘log5(9)=?
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log2(25)乘log3(4)乘log5(9)=?
log2(25)乘log3(4)乘log5(9)
=log2(5²)乘log3(2²)乘log5(3²)
=2log2(5)乘2log3(2)乘2log5(3)
=2×2×2×[log2(5)乘log3(2)乘log5(3)]
=8
再问: log2(5)乘log3(2)乘log5(3)怎麼變形乘?再詳細點好麼?謝謝
再答: log2(5)乘log3(2)乘log5(3) =log3(5)乘log5(3) =1 利用公式loga (b) 乘logb (c)=loga (c) loga (b) 乘logb (a)=1
=log2(5²)乘log3(2²)乘log5(3²)
=2log2(5)乘2log3(2)乘2log5(3)
=2×2×2×[log2(5)乘log3(2)乘log5(3)]
=8
再问: log2(5)乘log3(2)乘log5(3)怎麼變形乘?再詳細點好麼?謝謝
再答: log2(5)乘log3(2)乘log5(3) =log3(5)乘log5(3) =1 利用公式loga (b) 乘logb (c)=loga (c) loga (b) 乘logb (a)=1
log2 25乘log3 4乘log5 9等于多少 不用计算器
利用换底公式求值.log2(25)×log3(4)×log5(9)
log2 25*log3 4*log5 9 的值为( )A 6 B8 C15 D 30
log2 25*log3 4 *log5 9
利用换底公式求值:1.log2 25 ×log3 4 ×log5 9 2.(log4 3+log8 3)(log3 2+
log的计算 :log2(20)-log4(25)= log3(2)×log2(5)×log5(3)=?log2[log
高中数学题log2^25 * log3^4 * log5^9
log2 25 乘以log3 4 乘以log5 9
log2^25*log3^2倍根号2*log5^9=
log2(3)*log3(5)*log5(8)(具体步骤)
log2 5乘log5 4等于多少
高中对数log2(9)*log3(根号5)*log5(2)