Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
通过定义计算 f(x) = 2x^2 - 5x + 1 在 f'(1) 。（答：。）
通过定义计算 f(x) = 2x^2 - 5x + 1 在 f'(1) 。（答：。）
Natural Language
Math Input
Extended Keyboard
