Question

exeecitiul 12 punctul d...va rog!!!!!!

Answer 1

(√2-√3)/√6 +(√3-√4)/√12+(√4-√5)/√20+(√5-√6)/√30+(√4-√7)/√42+(√7-√8)/√56=
=√2/√6-√3/√6 +√3/√12-√4/√12+√4/√20-√5/√20+√5/√30-√6/√30+√6/ √42-
 -√7/√42+√7/√56-√8/√56=
=1/√3-1/√2 +1/√4-1/√3+1/√5-1/√4+1/√6-1/√5+1/√7-1/√6+1/√8-1/√7=
=-1/√2 +1/√8=-√2/2+√8/8=-√2/2+2√2/8=√2/4-√2/2=-√2/4