d) D= -3/31+ -6/17+ 1/25+ -28/31+ -11/17+ -1/5
Giải thích
d) D=−331+−617+125+−2831+−1117+−15
=−331+−2831+−617+−1117+125+−15
=−1+−1+125+−525
=−2+−425=−5425
Vậy: D=−5425
d) D=−331+−617+125+−2831+−1117+−15
=−331+−2831+−617+−1117+125+−15
=−1+−1+125+−525
=−2+−425=−5425
Vậy: D=−5425