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单选题 函数 f(x) = ln(x),其中 x > 0,它的导数为 ( )
A. e
学科：默认课程
时间：2025-12-18 21:56:42
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若f(x)=sinα-cosx,则f′(α)等于A. sinαB. cosαC. sinα+cosαD. 2sinα
题目2单选题
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题目3单选题
函数y=M(M为常数)的导数为A. MB. 0C. MxD. M-1
题目4单选题
x<img src="https://tihai-oss-cloud.itihey.com/img/e40397c98ec333358f33e50b3c1e1a1b.png">的导数为A. nxB. (n-1)xC. nx<img src="https://tihai-oss-cloud.itihey.com/img/3efcaa6323f3beac187d5fa495219574.png">D. nx<img src="https://tihai-oss-cloud.itihey.com/img/31261d5686fcfdffbec5d7b0ac2c644f.png">
题目5单选题
函数 f(x) = a^x,其中 a 为正实数且 a ≠ 1,它的导数为 ( )A. f'(x) = a<img src="https://tihai-oss-cloud.itihey.com/img/d8adf9293d2d2165da26c3f76f734d48.png"> ln(a)B. f'(x) = e<img src="https://tihai-oss-cloud.itihey.com/img/d8adf9293d2d2165da26c3f76f734d48.png"> ln(a)C. f'(x) = a<img src="https://tihai-oss-cloud.itihey.com/img/d8adf9293d2d2165da26c3f76f734d48.png"> lg(e)D. f'(x) = e<img src="https://tihai-oss-cloud.itihey.com/img/d8adf9293d2d2165da26c3f76f734d48.png"> lg(a)
题目6单选题
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题目7单选题
f(x) = sin(x) 的导数为 f'(x) =( )A. - sin(x)B. -cos(x)C. sin(x)D. cos(x)
题目8单选题
函数f(x)=e^x的导数f'(x)=( )A. e<img src="https://tihai-oss-cloud.itihey.com/img/c89f3d2257d0ee4437484956d7f6e6b0.png">B. (e<img src="https://tihai-oss-cloud.itihey.com/img/c89f3d2257d0ee4437484956d7f6e6b0.png">) /xC. (e<img src="https://tihai-oss-cloud.itihey.com/img/c89f3d2257d0ee4437484956d7f6e6b0.png">) *ln(x)D. (e<img src="https://tihai-oss-cloud.itihey.com/img/c89f3d2257d0ee4437484956d7f6e6b0.png">) *lg(x)
题目9单选题
f(x) = cos(x) 的导数为 f'(x) =( )A. cos(x)B. sin(x)C. -sin(x)D. -cos(x)
题目10单选题
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