2log(9)x=1/2+log(9)(5x+17)这里9是底数,(怕大家看不清楚^-^)
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2log(9)x=1/2+log(9)(5x+17)这里9是底数,(怕大家看不清楚^-^)
2log(9)x=1/2+log(9)(5x+17)
这里9是底数,
(怕大家看不清楚^-^)
2log(9)x=1/2+log(9)(5x+17)这里9是底数,(怕大家看不清楚^-^)
对原等式进行化间
log(9)x*x=log(9)3+log(9)(5x+17)
log(9)x*x=log(9)3*(5x+17)
x*x=3*(5x+17)
x*x-15x-51=0
就可一解出x了,要注意x是大于0的,不过此题的俩个解都大于0.
log(9)x2=log(9)3+log(9)(5x+17)
log(9)x2=log(9)3*(5x+17)
x2=3*(5x+17)
x-15x-51=0
x=(15±√429)/2
log(9)x^2=log(9)(3)+log(9)(5x+17)
X^2=3(5X+17)
X^2-15X-51=0
对数计算1.{log(4)(3)+ log(8) (3)} X {log(3)(2)+log(9)(2)}2.{log(2)(3)} X {log(3)(4)+log(9)(2)}3.(lg2)^+1g2X 1g5 +1g50
log 9 X/Y=1/2(log 3 X - log 3 Y) log 9 X/Y=1/4 3log 3 X =2log 3 Y find X and Y
log(2)5×log(5)81×log(3)4+In√e.还有(log(2)3+log(4)9)(log(3)4+1/2log(3)2)
log(9)x+log(x^2)3=1的解为?原方程可可化为log(3 ²)x+log(x)²3=1 ,∴1/2*log(3)X+1/2*log(x)3=1,∴[log(3)x]²-2log(x)3+1=0,即[log(3)x-1]²=0请问这里的[log(3)x]²-2log(x)3+1=0是怎么推出来的,刚学基础不好,
log(2)9log(3)4等于
log(2)9×log(3)4
log(27)32 × log(64)27+log(9)2 × log(4)根号27=?log(27)32 × log(64)27+log(9)2 × log(4)根号27=?
求对数不等式log(1/2,x+1)-log(1/2,9x^2-1)+1
于是f(x)=9[log(4,x)]^2-[log(2,x)]^2=9[1/2*log(2,x)]^2-[log(2,x)]^2=5/4*[log(2,x)]^2 怎么得的?
化简(log[4]3+log[8]3)×(log[3]2+log[9]2)如题
(log(2)9+log(4)1/9)乘以(log(3)2+log(9)0.5) 括号里是底数.计算这道题.
求值 log【9(下标)】3+log【 9(下标)】27 log【2】(1/2)- log【1/2】2
log(10)(25/9)减log(10)(7/4)减log(10)(1/9)加1/2log(10)(49)
64^1/3-(-2/3)^0+log(2)8+(log(8)9)/(log(2)3)
2^log(4)(3)加3^log(9)(1/4)加5^log(1/25)(2)
log(2)1/25乘以log(3)1/8乘以log(5)1/9
log(2)(25)×log(3)(1/16)×log(5)(1/9)=?
化简:(log^3 2+log^9 2)(log^4 3+log^8 3)