Solve the exponential equation $3^{\left(x-1\right)}=81$

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Final answer to the problem

$x=5$
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Apply the formula: $x^a=y$$\to x^a=pfgg\left(y,x\right)$, where $x^a=y=3^{\left(x-1\right)}=81$, $a=x-1$, $x=3$, $y=81$ and $x^a=3^{\left(x-1\right)}$

$3^{\left(x-1\right)}=3^{4}$

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$3^{\left(x-1\right)}=3^{4}$

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Learn how to solve problems step by step online. Solve the exponential equation 3^(x-1)=81. Apply the formula: x^a=y\to x^a=pfgg\left(y,x\right), where x^a=y=3^{\left(x-1\right)}=81, a=x-1, x=3, y=81 and x^a=3^{\left(x-1\right)}. Apply the formula: a^b=a^c\to b=c, where a=3, b=x-1 and c=4. Apply the formula: x+a=b\to x+a-a=b-a, where a=-1, b=4, x+a=b=x-1=4 and x+a=x-1. Apply the formula: x+a+c=b+f\to x=b-a, where a=-1, b=4, c=1 and f=1.

Final answer to the problem

$x=5$

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Function Plot

Plotting: $3^{\left(x-1\right)}-81$

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1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

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