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Find the value of. (i) (3^@+4^(-1)) xx 2...

Find the value of. (i) `(3^@+4^(-1)) xx 2^2` (ii) `(2^(-1)xx 4^(-1))-: 2^(-1)` (iii) `(1/2)^-2 + (1/3)^-2 + (1/4)^-2` (iv) `(3^-1 + 4^-1+ 5^(-1))^0` (v) `{((-2)/3)^-2}^2`

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