How do you solve #1-2lnx=-4#?

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Answer 1 · 2018-04-29T11:37:59

Solution : #x ~~12.18#

#1 -2 ln x = -4 or -2 ln x = -4 -1# or

#-2 ln x = -5 or ln x =5/2 or ln x = 2.5#

# :. x = e^2.5 ~~12.18(2 dp)#

Solution :#x ~~12.18# [Ans]

Answer 2 · 2018-04-29T11:43:45

#e^(5/2)~=12.1824#

#1-2lnx=-4#

#-2lnx=-4 color(red)( -1)=-5#

#lnx=(-5)/(color(red)(-2))#

#lnx=5/2#

#color(green)(log_(a)c=b#

#color(green)(c=a^b#

#x=e^(5/2)~=12.1824#