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Mathematics

Simplify :

(27)2n3×(8)n6(18)n2\dfrac{(27)^{\dfrac{2n}{3}} \times (8)^{-\dfrac{n}{6}}}{(18)^{-\dfrac{n}{2}}}

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Answer

Given,

(27)2n3×(8)n6(18)n2\dfrac{(27)^{\dfrac{2n}{3}} \times (8)^{-\dfrac{n}{6}}}{(18)^{-\dfrac{n}{2}}}

Simplifying the expression :

[(3)3]2n3×[(2)3]n6[(3)2×2]n2[(3)2n]×(2)n2[(3)2]n2×(2)n2(3)2n3n(3)2n(n)(3)2n+n33n.\Rightarrow \dfrac{[(3)^3]^{\dfrac{2n}{3}} \times [(2)^3]^{-\dfrac{n}{6}}}{[(3)^2 \times 2]^{-\dfrac{n}{2}}} \\[1em] \Rightarrow \dfrac{[(3)^{2n}] \times (2)^{-\dfrac{n}{2}}}{[(3)^2]^{-\dfrac{n}{2}} \times (2)^{-\dfrac{n}{2}}} \\[1em] \Rightarrow \dfrac{(3)^{2n}}{3^{-n}} \\[1em] \Rightarrow (3)^{2n - (-n)} \\[1em] \Rightarrow (3)^{2n + n} \\[1em] \Rightarrow 3^{3n}.

Hence, (27)2n3×(8)n6(18)n2=33n\dfrac{(27)^{\dfrac{2n}{3}} \times (8)^{-\dfrac{n}{6}}}{(18)^{-\dfrac{n}{2}}} = 3^{3n}.

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