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(7+2)la puterea-1+(7-2)la puterea -1​

Răspuns :

(7+2)⁻¹+(7-2)⁻¹=

=(9⁻¹)+ (5⁻¹)

=[tex]\frac{1}{9} +\frac{1}{5}[/tex]

=[tex]\frac{14}{45}[/tex]