1.函数f(x)=log1/2(x²-3x+2)的单调递增区间是A.(-∞,1) B.(-∞,3/2] C.(3/2,+∞) D.(2,+∞)2.已知集合A={y|y=log2(x),x>1},B={y|y=(1/2)的x次幂,x>1}则A∪B=A.{y|00 A.e(1/2) B.ln1/2 C.-1/2 D.1/24.设f(x)=lg(10(x)+1)+ax是
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![1.函数f(x)=log1/2(x²-3x+2)的单调递增区间是A.(-∞,1) B.(-∞,3/2] C.(3/2,+∞) D.(2,+∞)2.已知集合A={y|y=log2(x),x>1},B={y|y=(1/2)的x次幂,x>1}则A∪B=A.{y|00 A.e(1/2) B.ln1/2 C.-1/2 D.1/24.设f(x)=lg(10(x)+1)+ax是](/uploads/image/z/10335100-4-0.jpg?t=1.%E5%87%BD%E6%95%B0f%28x%29%3Dlog1%2F2%28x%26sup2%3B-3x%2B2%29%E7%9A%84%E5%8D%95%E8%B0%83%E9%80%92%E5%A2%9E%E5%8C%BA%E9%97%B4%E6%98%AFA.%EF%BC%88-%E2%88%9E%2C1%EF%BC%89+B.%28-%E2%88%9E%2C3%2F2%5D+C.%EF%BC%883%2F2%2C%2B%E2%88%9E%EF%BC%89+D.%EF%BC%882%2C%2B%E2%88%9E%EF%BC%892.%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7By%7Cy%3Dlog2%28x%29%2Cx%3E1%7D%2CB%3D%7By%7Cy%3D%281%2F2%29%E7%9A%84x%E6%AC%A1%E5%B9%82%2Cx%3E1%7D%E5%88%99A%E2%88%AAB%3DA.%7By%7C00+A.e%281%2F2%29+B.ln1%2F2+C.-1%2F2+D.1%2F24.%E8%AE%BEf%28x%29%3Dlg%2810%28x%29%2B1%29%2Bax%E6%98%AF)
1.函数f(x)=log1/2(x²-3x+2)的单调递增区间是A.(-∞,1) B.(-∞,3/2] C.(3/2,+∞) D.(2,+∞)2.已知集合A={y|y=log2(x),x>1},B={y|y=(1/2)的x次幂,x>1}则A∪B=A.{y|00 A.e(1/2) B.ln1/2 C.-1/2 D.1/24.设f(x)=lg(10(x)+1)+ax是
1.函数f(x)=log1/2(x²-3x+2)的单调递增区间是
A.(-∞,1) B.(-∞,3/2] C.(3/2,+∞) D.(2,+∞)
2.已知集合A={y|y=log2(x),x>1},B={y|y=(1/2)的x次幂,x>1}则A∪B=
A.{y|00
A.e(1/2) B.ln1/2 C.-1/2 D.1/2
4.设f(x)=lg(10(x)+1)+ax是偶函数,那么a的值为:
A.1 B.-1 C.-1/2 D.1/2
5.函数f(x)=3(x)在下列哪个区间有零点
A.[-2,-1] B.[-1,0] C.[0.1] D.[1,2]
所有y(x)形式的都是表示y的x次幂
给选项就行!
就是设 f(x)=lg(10的x次幂+1) + ax 是偶函数
函数f(x)=3的x次幂+x 在下列哪个区间有零点
1.函数f(x)=log1/2(x²-3x+2)的单调递增区间是A.(-∞,1) B.(-∞,3/2] C.(3/2,+∞) D.(2,+∞)2.已知集合A={y|y=log2(x),x>1},B={y|y=(1/2)的x次幂,x>1}则A∪B=A.{y|00 A.e(1/2) B.ln1/2 C.-1/2 D.1/24.设f(x)=lg(10(x)+1)+ax是
B
B
D
后两道题目有问题,在下不懂!