Question

Calcule o valor das expressões:
${3}^{ - 1} - ( - 3)^{2} + ( - 3)^{ + 2} \\ \ {3}^{2} + {3}^{ - 2}$
${2}^{2} - {2}^{ - 2} \\ {2}^{2} + {2}^{ - 2}$

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Answer 1

As respostas seriam estas:

$a) [3^{-1} - (-3)^{2} +(-3)^{+2}]\\[(0,333) - (-9) + (-9)]\\[(0,333) + 9 - 9]\\[(0,333) + 0]\\0,333\\\\b) 3^{2} +3^{-2} \\9 + (0,11111)\\9, 11111\\\\\\c) 2^{2} -2^{-2} \\\\4 - 0,25\\3,75\\\\d)2^{2} +2^{-2} \\4 + 0,25\\4,25$