数学
“数学” 问题列表
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问题：双曲线x2-y2/2 =1在点(-√2,√2)处的切线的方程是( ).(A)y=-x+√2.(B)y=-x+3√2.(C)y=-2x-√2.(D)y=-2x+3√2....
Wednesday, July 16, 2025
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问题：三角式√6tan10°+4√2cos80°的值等于____....
Wednesday, July 16, 2025
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问题：已知集合P={x|0 ≤x ≤5,x∈Z},Q={y|y=|x2-1|,x∈P},则P∩Q中元素的个数是( ).(A)3.(B)6.(C)8.(D)9....
Wednesday, July 16, 2025
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问题：已知向量a,b,c是三个具有公共起点的非零向量,且|a|=2|b|=2,又a·b=-1, 〈a-c,b-c 〉=π/3 ,则当|a-c|=7时,向量a与c的夹角是____....
Wednesday, July 16, 2025
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问题：方程log13|x|=sin(π/2-1/2x)的实根的个数是( ).(A)2.(B)4.(C)6.(D)8....
Wednesday, July 16, 2025
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问题：已知函数f(x)={(1-tan2x)/(1+tan2x)}2 ,则f(x)的最小正周期是( ).(A)2π.(B)3/2π.(C)π.(D)π/2 ....
Wednesday, July 16, 2025
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问题：已知点M是△ABC所在平面内的一点,且满足MA2+MB2+MC2=4,那么△ABC三条边长之积AB·BC·CA的最大值是____....
Wednesday, July 16, 2025
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问题：The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).(A)4.(B)3√2.(C)2√5.(D)√17....
Wednesday, July 16, 2025