表达式2: left parenthesis, 1 minus "x" squared times left parenthesis, 1 minus "T" Superscript, "x" , Baseline , right parenthesis , right parenthesis Superscript, StartFraction, "V" Over "x" cubed , EndFraction , Baseline left brace, "x" greater than 0 , right brace left brace, StartFraction, "V" Over "x" cubed , EndFraction greater than 1 , right brace1−x2·1−TxVx3x>0Vx3>1