已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 23:48:41
已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2l
已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)
已知log9[log8(log7x)]=0,则x=
还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)
已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)
log8(log7x)=1
log7(x)=8
x=7^8
lga+lgb=lg(ab)=2lg(a-2b)=lg(a-2b)^2
(a-2b)^2=ab
a^2-5ab+4b^2=(a-b)(a-4b)=0
a-2b>0,a>0,b>0
a-b>b>0
a-4b=0,a=4b
log4(a/b)=log4(4)=1
log9[log8(log7x)]=0求x需具体过程,一步也不能落下
已知log9[log8(log7x)]=0,则x=还有一题呃:lga+lgb=2lg(a-2b),求log4(a/b)
计算:(log4 3+log8 3)×log9 √2=?
计算10^lg3=________;log8 9·log9 64=______.
【(log4)^3+.(log8)^3】【.(log3)^2+.(log9)^2】=几啊
X=log5 6*log6 7*log7 8*log8 9*log9 10 那么X的范围
log5^6*log6^7*log*7^8*log8^9*log9*10*lg5=为什么?
(log4 3+log8 3)(log3 5+log9 5)(log5 2+log25 2)=
计算log8^3乘以log9^4
计算:log9(16)×log8(81)
1.(log3 2+log9 2)(log4 3+log8 3) 2.已知log18 9=a.18^b=5.求log36 45.(用a,b表示)一定要详细的不能在详细.3.换底公式怎样用?
a=log9 2/3 b=log8 根号3 c=1/4 比较大小log9 log8为底数 2/3 根号3为真数要求有过程````
若tanA、tanB是方程x^2-2(log8 72 + log9 72)x-log8 72·log9 72=0的两个根,求sinA·cosB+cosA·sinB+2sinA·sinB的值
已知三个数:a=log92/3,b=log8√3,c=1/4,则a,b,c的大小关系为已知三个数:a=log9(2/3),b=log8(√3),c=1/4,则a,b,c的大小关系为
(log3^2 + log9^4)×(log4^3 + log8^3)
(log3 2+log9 2)*(log4 3+log8 3)求值
计算log9(根号2)*[log4(3)+log8(3)]
化简(log4(3)+log8(3))(log3(2)+log9(2))