sarrivera579
29.11.2020 •
Mathematics
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Answers on questions: Mathematics
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Ответ:
Ответ:
May I kindly remind all the little brains out there that this site/app is for school-work and school-work only
Ответ:
4log4(10x)=41/2
10x=2
x=1/5
Step-by-step explanation:
The first problem involves applying the addition property
log64+log69=log6(4⋅9)=log636=log662=2
The next requires subtraction property
log3(P/Q)=log3P-log3Q=6-7=-1
The next will require a calculator but first we need to solve for x. But how do we get x by itself?
Lets take the log base 10 (typically just written as 'log') of both sides
log(4x+2)=log(14)
Here we can apply the exponent property of logarithms
log(4x+2)=(x+2)log(4)=log(14)
now lets solve for x
x+2=log(14)/log(4)
x=log(14)/log(4)-2
Now we can calculate the logs using most scientific calculators. You can do that...
The last problem starts by using the addition property again:
log42+log45x=1/2
log4(2⋅5x)=log4(10x)=1/2
To finish solving for x we have to remember that y=ax and y=logax are inverses. So if we feed each side of the equation into the function f(x)=4x we'll get...
4log4(10x)=41/2
10x=2
x=1/5
correct me if im wrong