Найдите значение выражения : 1.( - 5/8 ) * ( - 4/5 ) * ( - 3/4 ) * ( - 2/3 ) * ( - 1/2 )
2. ( - 7/11 ) * ( - 6/7 ) * ( - 5/6 ) * ( - 4/5 ) + 2/3
3. ( - 11/15 ) * ( - 10/11 ) * ( - 9/10 ) + ( - 7/9 ) * ( - 6/7 ) + 4/15.
2. ( - 7/11 ) * ( - 6/7 ) * ( - 5/6 ) * ( - 4/5 ) + 2/3
3. ( - 11/15 ) * ( - 10/11 ) * ( - 9/10 ) + ( - 7/9 ) * ( - 6/7 ) + 4/15.
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2)1/3+2/3=1+2/3=1
3)-1/5*3+1/3*2+4/15=-3/5+2/3+4/15=-9+10+4/15=5/15=1/3