f'(x)<0，x∈(a，b)，是函数f(x)在(a，b)内单调减少的（）。

A (0，5] B (1，5] C (1，5) D (1，+∞)

A 0 B 1 C 2 D 4

A 0 B e C -e D -2e

A f(0)<0 B f(1)>0 C f(1)>f(0) D f(1)<f(0)

A dsinx=-cosx B dsinx=-cosxdx C dcosx=-sinxdx D dcosx=-sinx

A 仅有铅直渐近线 B 仅有水平渐近线 C 既有水平渐近线又有铅直渐近线 D 无渐近线

A <img src="https://www.beizhujiaoyu.com/uploads/202208/161187808043631.png" width="88" height="31" />  B <img src="https://www.beizhujiaoyu.com/uploads/202208/161187808591051.png" width="70" height="17" />  C <img src="https://www.beizhujiaoyu.com/uploads/202208/161187809156491.png" width="94" height="32" />  D <img src="https://www.beizhujiaoyu.com/uploads/202208/161187809665941.png" width="76" height="32" /> 

A x<img src="https://www.beizhujiaoyu.com/uploads/202208/16118781063841.png" width="29" height="30" /> B -x<img src="https://www.beizhujiaoyu.com/uploads/202208/161187811126501.png" width="29" height="30" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/161187811534581.png" width="45" height="30" /> D -<img src="https://www.beizhujiaoyu.com/uploads/202208/161187812056301.png" width="45" height="30" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/161187812573541.png" width="53" height="32" /> B tanxdx C cotxdx D  -tanxdx