设log5 7=a ,log2 5=b ,则log2 7= 能写写过程么,
问题描述:
设log5 7=a ,log2 5=b ,则log2 7= 能写写过程么,
答
log2 7 = log2 5 × log5 7 = ab
设log5 7=a ,log2 5=b ,则log2 7= 能写写过程么,
log2 7 = log2 5 × log5 7 = ab