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Exercise

$3^{2n}+3^{-n}+9^{-n};\:3^n=2$

Step-by-step Solution

1

Calculate the numerical value for $3^{2n}+3^{-n}+9^{-n}$ when $3^n=2$. Replace the unknowns with their corresponding values

$3^{2n}+3^{-n}+9^{-n}$

Final answer to the exercise

$3^{2n}+3^{-n}+9^{-n}$

Try other ways to solve this exercise

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  • Integrate by partial fractions
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  • FOIL Method
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  • Integrate by trigonometric substitution
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Main Topic: Numerical value of an algebraic expression

The numerical value of an algebraic expression is the result obtained by substituting the variables by a numerical value given.

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