Question

simplify
${3}^{n + 4} - 6 \times {3}^{n + 4} \div {3}^{n + 2} \times 7$
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Answer 1

Answer:

$81n^4 - 378$

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Step-by-step explanation:

$3^(n+4) - 2. 3^1 . 3^(n+4) / 3^(n+2) \times 7$

$3^(n+4) -6 3^n 3^4 / ( 3^n . 3^2) \times 7$

$3^(n+4) -6 . 3^2 \times 7$

$81n^4 - 54\times7\\81n^4 -378$