(2)[tex=6.143x1.357]6uCtWWHD52X1NxKYl6Vqp6xs5a1Bdf32Zh1Pwhts198=[/tex]
举一反三
- 以下选项中,仅当x的绝对值在1至6范围内时,表达式值为“真”的是: (x>=-6)&&(x<=-1)||(x>=1)&&(x<=6)|(x>=-6)||(x<=-1)||(x>=1)||(x<=6)|(x>=1)&&(x<=6)&&(x>=-6)&&(x<=-1)|(x>=1)&&(x<=6)||(x>=-1)&&(x<=-6)
- 以下选项中,当且仅当x的绝对值在1至6范围内表达式值为"真"的是( )。 A: (x>=-6)&&(x<=-1)||(x>=1)&&(x<=6) B: (x>=1)&&(x<=6)&&(x>=-6)&&(x<=-1) C: (x>=-6)||(x<=-1)||(x>=1)||(x<=6) D: (x>=1)&&(x<=6)||(x>=-1)&&(x<=-6)
- 已知随机变量X~B(n,1/2),且P{X=5}=1/32,则n=___________ A: 5 B: 6 C: 7 D: 8
- 计算\(\oint_L x ds\),其中\(\)为由直线\(y=x\),及抛物线\(y=x^2\)所围成的区域整个边界。 A: \({1 \over {12}}(5\sqrt 2 + 6\sqrt 5 {\rm{ - }}1)\) B: \({1 \over {12}}(6\sqrt 5 + 5\sqrt 2 {\rm{ - }}1)\) C: \({1 \over {12}}(5\sqrt 5 + 6\sqrt 2 {\rm{ - }}1)\) D: \({1 \over {12}}(5\sqrt 5 + 6\sqrt 2 + 1)\)
- (2)[tex=6.143x1.357]6uCtWWHD52X1NxKYl6Vqp6xs5a1Bdf32Zh1Pwhts198=[/tex]