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)