rndbwls5760
12.05.2021 •
Mathematics
3n - 18 = 9
a. 3
b. 4
c.9
D.No solution
Solved
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Ответ:
C
Step-by-step explanation:
The equation given is an exponential equation:
The first step in solving these type of equations is to take the Natural Logarithm (Ln) of both sides, so we have:
Now, we use the property of logarith shown below to further simplify:
We can write:
From basic exponential theory, we know Ln(e) = 1, thus we have:
Using calculator, we have:
Rounding to 2 decimal places,
x = 0.88
Answer choice C is right.