64 lines
781 B
Plaintext
64 lines
781 B
Plaintext
ans
|
|
|
|
17444
|
|
$1$
|
|
|
|
17445
|
|
$[2k\pi,2k\pi+\pi ]$, $k\in \mathbf{Z}$
|
|
|
|
17446
|
|
$-\dfrac{1}{2}$
|
|
|
|
17447
|
|
$3\pi$
|
|
|
|
17448
|
|
$\dfrac{59}{4}$
|
|
|
|
17449
|
|
$6$
|
|
|
|
17450
|
|
$-1$
|
|
|
|
17451
|
|
$\dfrac{\pi}{2}$
|
|
|
|
17452
|
|
$-\mathrm{i}$
|
|
|
|
17453
|
|
$\sqrt{2}$
|
|
|
|
17454
|
|
$8$
|
|
|
|
17455
|
|
$(-2,0)\cup (0,2)$
|
|
|
|
17456
|
|
D
|
|
|
|
17457
|
|
C
|
|
|
|
17458
|
|
D
|
|
|
|
17459
|
|
D
|
|
|
|
17460
|
|
(1) 当$\alpha$为第一象限角时, $f(\alpha)+g(\alpha)=\sqrt{2(1-m^2)}$; 当$\alpha$为第一象限角时, $f(\alpha)+g(\alpha)=-\sqrt{2(1-m^2)}$; (2) $\dfrac{2}{5}$
|
|
|
|
17461
|
|
(1) 证明略; (2) 证明略
|
|
|
|
17462
|
|
(1) $\hat{y}=\hat{c}+\hat{d}\ln x$更好; (2) $\hat{y}=60\ln x+12$; (3) $30$万元
|
|
|
|
17463
|
|
(1) 焦点为$(0,\dfrac{p}{2})$, 准线为$y=-\dfrac{p}{2}$; (2) $k=2$; (3) 证明略
|
|
|
|
17464
|
|
(1) $y=f_1(x)$与$y=f_2(x)$都是$\mathbf{R}$上的``平缓函数''; (2) 证明略; (3) 证明略 |