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Ex 6 √(3-√7)² + √(√7-21²

Ex7 1-3 | + |3-√π] + 14-√TT|
1

Ex 8 √√√(2-√7)² = (4+√7)

Exg Determinati elementele multimii

A= {xE2 | 1x-51 < 19}​