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a) 1/2√3 = 1√3/ 2×3 = 1√3/6
b) 3/√32= 3/4√2 = 3√2/ 4×2= 3√2/ 8
c) 3/2√5- 3√2= 3( 2√5+3√2)/ (2√5)²- (3√2)²
3(2√5+3√2)
2
sper că sunt corecte