:解(1/T+1/T+6)4+{1/T+6(T-4)}=1

题目详情

:解(1/T+1/T+6)*4+{1/T+6*(T-4)}=1

▼优质解答

答案和解析

(1/T+1/T+6)*4+{1/T+6*(T-4)}=1
(2/T+6)*4+{1/T+6T-24)}=1
8/T+24+1/T+6T-24=1
9/T+6T=1
9+6T²=T(T＞0)
6T²-T+9=0
判别式=(-1)²-4×6×9＜0,因此在实数范围内无解

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