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碩士班-統計所 106年

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國立政治大學

106 學年度碩士班招生考試試題

第1頁,共2頁

考試科目︱基礎數學

叫什LMV

象所別︱統計學系 考試時間I 2月1.8日(六)第一節

Note. You need to show your work in your solutions for the following problems instead of giving final answers only.

1. (20 points) Suppose that

z

tz qd

vi f O Z 一 趴 rlIEl--Et 一一 、‘’’,z rtt、 r’d if x = 0﹔ if x

<

1d z

手。﹔

if l

<

x

<

2﹔ if x > 2.

Find Ji°''

f(x)dx

and

f立。

f(x)dx.

2. (16 points) Find the following 恆的.

(a

)肉。(

1 +﹔

γ

(b

)阿

一一串通

;re

壘, s(x) (c) _lirn =-立于�:i:;

-’

ex, X -

Slil{X

伸統

治﹔刊于)

3, (14 points) Suppose that u is a differentiable function of x such that

u

+

xcos

包) = 1

and u = 0 when x = 1. Let

你的=

fox f/

+s

s(

for

x,

y

ε(一oo, oo). Determine whether

f

ha local minimum or a

local maximum at the point (1, 0). Justify yourswer.

4. (12 points) Suppose thatαis a real number and α手0. Let

、、IEEE『I/

nu α 1i GIα 1α0

’’,’,aBEEt、1、

一-

A

(a) Show that 1 iseigenv,叫ue of

A.

(b) Find an eigenvector of A associated with the eigenvalue 1.

(c) Find all eigenvalues of

A

thate not equal to 1.

言主 一、作答於試題土者,不予計分。

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