1.若2的6a次方=3的3b次方=6的2a次方,求证:3ab-2ac=bc
1.若2的6a次方=3的3b次方=6的2a次方,求证:3ab-2ac=bc
2.已知lga+|lgb|=-2,|lga|+lgb=-3,求a与b的值
3.设a,b,c是三角形ABC的三边,且a不等于1,b小于c,若log(c+b)底a+log(c-b)底a=2log(c+b)底a*log(c-b)底a,判断三角形ABC形状
解一条是一条
2.已知lga+|lgb|=-2,|lga|+lgb=-3,求a与b的值
3.设a,b,c是三角形ABC的三边,且a不等于1,b小于c,若log(c+b)底a+log(c-b)底a=2log(c+b)底a*log(c-b)底a,判断三角形ABC形状
解一条是一条
数学人气:310 ℃时间:2020-04-04 03:07:07
优质解答
给你做一下吧,搞这么多,呵呵1.若2^6a=3^3b=6^2c,求证:3ab-2ac=bc证明:设2^6a=3^3b=6^2c=t,则:log(2)t=6a;log(3)t=3b;log(6)t=2c即:log(t)2=1/6a log(t)3=1/3b log(t)6=1/2c而:log(t)6=log(t)2+log(t)3所以...
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