Evaluate
\frac{1}{81}\approx 0.012345679
Factor
\frac{1}{3 ^ {4}} = 0.012345679012345678
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3^{-5}+\frac{1}{3^{5}}+\frac{1}{3^{5}}
Rewrite 3 as 3^{-4}\times 3^{5}. Cancel out 3^{-4} in both numerator and denominator.
\frac{1}{243}+\frac{1}{3^{5}}+\frac{1}{3^{5}}
Calculate 3 to the power of -5 and get \frac{1}{243}.
\frac{1}{243}+\frac{1}{243}+\frac{1}{3^{5}}
Calculate 3 to the power of 5 and get 243.
\frac{2}{243}+\frac{1}{3^{5}}
Add \frac{1}{243} and \frac{1}{243} to get \frac{2}{243}.
\frac{2}{243}+\frac{1}{243}
Calculate 3 to the power of 5 and get 243.
\frac{1}{81}
Add \frac{2}{243} and \frac{1}{243} to get \frac{1}{81}.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}