Răspuns:
Explicație pas cu pas:
Ex.7) b) 10/√75 = 10/√(3·25) = 10/5√3 = 2/√3 = 2√3/3
c) -22/√242 = -22/√(121·2) = -22/11√2 = -2/√2 = -2√2/2 = -√2
g) 8/√54 = 8/√(9·6) = 8/3√6 = 8√6/18 = 4√6/9
h) 3/-√72 = -3/√(36·2) = -3/6√2 = -1/2√2 = -√2/4
i) -7/√200 = -7/√(100·2) = -7/10√2 = -7√2/20
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