解答

(30) (50)

15

十进制

3.87298 \dots

求解步骤

(30) (50)

计算两个向量的标量积:

(x_{1}, \dots, x_{n}) \cdot (y, \dots, y_{n}) = i = 1 \sum n x_{i} y_{i}

= 35 + 0 \cdot 0

化简

35 + 0 \cdot 0 : 15

= 15

流行的例子

m o n o t o n e \frac{x + 1}{x + 3}

in v erse f (x) = 13

in v erse f (x) = 2 + ln (ln (x - 3))

e x t re m e f (x) = x^{3} - 2 x - 1

y = x^{2} + 4 x + 4