计算:log小2 根号7/48+log小2 12-1/2log小2 42

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计算:log小2根号7/48+log小212-1/2log小242计算:log小2根号7/48+log小212-1/2log小242计算:log小2根号7/48+log小212-1/2log小242l

计算:log小2 根号7/48+log小2 12-1/2log小2 42
计算:log小2 根号7/48+log小2 12-1/2log小2 42

计算:log小2 根号7/48+log小2 12-1/2log小2 42
log2[(√7)/48]+log2(12)-(1/2)log2(42)
=log2[(√7)/48]+log2(12)-log2(√42)
=log2{[(√7)/48]*(12)/(√42)}
=log2[√(7*42)/4]
=log2[(7√6)/4]

log2(√(7/48)+log2(12)-(1/2)log2(42)
=log2[√(7/48)*12/√42]
=log2[(√7*12/(√8*√6*√7*√6)]
=log2[12/(2√2*6)]
=log2(1/√2)
=log2[2^(-1/2)]
=-1/2