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Mathematics

(2 + 3)-1 x (2-1 + 3-1) is equal to :

  1. 6

  2. -6

  3. 16\dfrac{1}{6}

  4. 16-\dfrac{1}{6}

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Answer

Given,

⇒ (2 + 3)-1 x (2-1 + 3-1)

(2+3)1×(21+31)(15)×[(12)+(13)]15×[3+26]15×5616.\Rightarrow (2 + 3)^{-1} \times (2^{-1} + 3^{-1}) \\[1em] \Rightarrow \Big(\dfrac{1}{5}\Big) \times \Big[\Big(\dfrac{1}{2}\Big) + \Big(\dfrac{1}{3}\Big)\Big]\\[1em] \Rightarrow \dfrac{1}{5} \times \Big[\dfrac{3 + 2}{6}\Big]\\[1em] \Rightarrow \dfrac{1}{5} \times \dfrac{5}{6}\\[1em] \Rightarrow \dfrac{1}{6}.

Hence, option 3 is the correct option.

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