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hanya dipenuhi jika x = 1, maka nilai dari :
a) x^2 + x^(-2) = 1^2 + (1)^(-2) = 1 + 1 = 2
b) x^(3/2) + x^(-3/2) = (1)^(3/2) + (1)^(-3/2) = 1 + 1 = 2