d) D = 5+ căn bậc hai 5/ căn bậc hai 5 + 2 + căn bậc hai 5/ căn bậc hai 5 -1 - 3 căn bậc hai 5/ 3+ căn bậc hai 5
Giải thích
d) D=5+55+2+55−1−353+5=5+55−25+25−2+55+15−15+1−353−53+53−5=35−5+5+54−95−154=35−5+5+5−95+154=35−5+5−25=5Vậy D=5
d) D=5+55+2+55−1−353+5=5+55−25+25−2+55+15−15+1−353−53+53−5=35−5+5+54−95−154=35−5+5+5−95+154=35−5+5−25=5Vậy D=5