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U niversity of Al-QadisiYah

College of Education

'"r':l:lt of ma1emlcs

1.t SemesterExam

Academic year

_l!9!91?017

Subject: Mathematical analYsis

Time: 1.5 hrs

Daret].6 /l 1201,7

Ql/ Which of the following statements is true and which of them

is false and why? (12 marks)

l-. For any family {Vo} of closed set in a metric space [X,d), then

laeyVa is closed.

2. Ifthe sequence < an> converge to zero Y n e z+ then

) ar, is convergent series.

3. The equation x2=2 has only one real positive root.

4. For any real number r there exist a sequence of irrational

numbers converge to r.

lf an 2 O Y n,and ! on convergent series then ) #; it

convergent series.

IR is uncountable set.

If (X,d) be a metrtc space , prove that: [6 marks)

L.lf A subset o/ X then4fuA) is closed set.

2.lf O + S g X and S is a closed set then (S,dr) complete

subspace ofX.

5.

6.

Q2/

Lecturer

Fatma K Majeed

Good Luck

Head of Dept.

Dr.Mazin Omran Kareem

2/

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University of Al-QadisiYaCollage of Education

First Examination2016-2017U2120t7

Time: One hour and half

Dep artm ert ol l4utlr.- ufuQr\ a) Prove or disProve the

1- If (1, +, ') be an idealcommutative.

Qz\ a)b)c)

d)

following statements:

of a ring (R, +, ') such that (R/1, +,

Subject: Ring of Algebra(12 degree)

') commutative ring then (R, +, ')

Z-ln a rtng (2, +, '),-f. Z--Z nontrivial homomorphism then/ equal identity map.

3- Every non zero nilpotent element is zero divisor'

4- The identity element (if there exist) of subring (S, +, ') and ring (R, +, ') is a same'

b) Let (1, +,.) be an ideal of a ring (R, +, '), prove (ann(,Q, +, ') is an ideal' (3 degree)

Let (R, +, ') be a ring with identity and a is nilpotent element, prove l+a is invertible in R'

State without proof theorems of isomorphism ring. (12 degree)

Let (1,+, '; ani (J, *, ') be two ideals of a ring (R, *, '), prove R:1O J iff V x e R can be

written uniquely in the form x:atb , a e I and b e J'

Let X:{1,2,3,,4}, find characteristic of ring (P(X), A,n)'

er\ a) Letf:R-, R'be epirnorphism such that R principal ideal domain, prove that R principal

ideal domain. (9 degree)

b)Letf be a nontrivial homomorphism from simple ring (R, +, ') into ring (R ,* ,' ), prove/

one to one.

c) Prove thal (2,, +,, integral domain iff nGood luck

me number.

Ass.prof. Hassan R.

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College of EducationDepartment of Math

EXAM ['t]PART301112017

CalculusTime: 1.5 Hour

Ql: A: Prove or disprove: (Choose Three)

7. lf / is even function then / is injection;

2. Lel a e Z* thenevery number of the tot^ J2a +1is rational;

3. (Q,+,.) Completeness ordered field;

4. lf / and g are odd functions lhen gof is even function.

(9 Mark)

B: What value of x satisfy: (Choose Two)

1. I ' l=r,ls(')l

2. (x2 -2x+l)(x-4)>0;3. sign(x): [r]]

(8 Mark)

Q2: A: Sketch the functions:

(t) f (x): lx' - 3l;

(_t- J,

(2) g(x)= ]r(r,| -rI

Ix+t

(8 Mark)

x>l-l<x<1.x<-l

B: Discuss the composition of the Two functions /(x) : l*l ,

g(x) :.tr +T. (8 Mark)

.\

C: Show lhat Lim ' .. = -cn,-i;1x_z),(7 Mark)

--WITH MY FORTUNE WISHES..

Ass. L. Fieras.load Alysaary

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University of Al-Qadisiyah

College of Education

Department of Mathematics

First semester exam 2016 -2017

Subject : Algebra of

Class : second

Time : 90 minutes

Date : 29 lll2017

Groups

Ql / A) Define and give a non-trivial example of the following :

l) finite group 2) odd permutation

3) the order of element in a group 4) semigroup

B) If (H,,r) is asubgroup of the group (G,'r) then prove that either a * H = b * H

or(axH)n(b*H)=@

Q2l A) Prove that every cyclic group is commutative .

B) Write all the subgroups of :

l) the group of symmetries of the triangle . 2) the group (S+,o) of order 4

C)If a,b,c e Z anda= b(modn) then ac = bc(mod n).provethat

ii-,;rJt ,,,ti1

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Q3/ Choose the correct answer and prove your answer:

I ) In a group (P(X), A)where X is anon_empty set ,the inverse of .4 is

a)0 b) A" c)A d)x

2) If (G ,*) is a group and x E G then x-2 -_

a) (x-t1-r q ; c) x-L * y-r d) Gx)2

3) In a group (Sr,o) , the number ofnon_cyclic subgroup is

a)1 b)2 c)3 d)4

4) In a group (G,*) , if x,y e G and r-1 _ y then

a)x-y b)x*y-l -e c)x*y-e d)x-1 *y-e

with my best wishes

Examiner : Lect. Dr. Mazen Otnran Karim.

Cyt+Y'----> :2--ts

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elJll :, t. rl

,3rJr.!Cl 4ilgj 3;J-lt2011-l-29 '-{1-f)l

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\ -, tr t-r6ll L.l+'t'z l+ or i$d,,l+t1Jll f""!

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Q1) Answer four questionS Only of the following: (5 Marks for each question)

la) Finrl all direct summand submodules of the Z-module Z with proof'

(b) State and prove the Second Isomorphism Theorem for modules'

(c) Let M, N and 11 be finitely generated left X-modules, Show that whether the left R-module M @N @K is

finitely generated or not and whY?

(d) Let M be a left fi-module and A, B,C be left submodules of M. show that whether

.4 + B) n C - GnC) + (B n C) ornotandwhy?

1"1 St oro tttut t hether a submodule of aifrygleft X-module is -module or not and why?

Q2) (r) Give an example of the following with proof:

1- Three left X-homomorphisms ai iNi' M' (i=1,2,3)

2- Short exact sequence of left .R-modules is not split'3- Finitely presented R-module is not free.

(6 Marks)such that a1@ a2@ a3 is an epimorphism'

(b) State an equivalent statement of split monomorphism with proof' (5 Marks)

(c) prove that a cyclic left R-module M =< a > is simple if and only if anna(a) is a maximal left ideal of iR.

d#lrll f {- OL:.J i".ic .r,p.i ;6rlJl gr-.;reP.i OlJ..e OJU .r.t :fl.,,rtll o'+jJ

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Qadisiya University

College OfEducation

Department Of Mathematic

Second class

Mathematic

251112017 : time l.5h

Q1,1. If < P, ) is a sequence of parabolas, such that the equation of the

parabora P, is x2 -2ffr*(#)' -+t-ffi-0, which

converges to a parabola P. Find the equation of the parabola P

it's properties with graph. (4marks)

2.Let flx) is a tunction such that f")@):(-1)' /(i, J"*')(o)=o

fla)--l for all neN and a is real number. Find the Taylor series

around 4 ofthis function and the interval of convergence. When a:0determine this function. (5marks)

3. Show that which ofthe following series is absolutely convergent

which ofthem is conditionally convergent or not convergent:

. ..- cos(nn)r- Ln=t--ii-

(3marks)

ii. xff=,L# iii. t;=1C1t*+:! t)* ** + * + * * *,8+ + ** r*.8't + * + t* ** * * ** * *+ * * ** ** **,1. '1.+:i'i{.*,* ** 'l'++:} + + ** + t* * *:t

Q2:1. Convert the periodic number to the rational number: (2marks)

i. 11.171818181818... ii.5.1333333...2. Determine the type and Find the propefties of the following conic

sketch the graph: l6x2 - 9y2 + 64x - 90y = 305. (3marks)

3. Find the value ofa such that the sum ofthe series Xf=, a (!)"equul

to the seventh term of the sequence .; ,; ,+ ,* ,';

With Best Wishes

Alaa Kamel Jaber

(3marks)

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(9'

UniversitY of Al-QadisiYah

College ofEducation

DePartment of Mathematics

c-l'cr" 'hird

Numerical AnalYsis

t-4

Q1: Consider the following set

(4,14), (6,30) bY use divide

aPProximation value of f(2)'

of data (0,-10), (1, 20)'

differences compute the

Q2:Isiterativeformulag(x)=f(x)+xtofindtheroot- t=rl of the functio l9 z!!x -- 1) converge.? if not

n.rain" formula and find the roots for seven iteration

Q3: A : Prove 1- E:ehD' 2' L3Y;Y3Y5'

B : Use Gauss-Jordan elimination method to solve

each sYstem

)y+y-7= -5

x-3y+22+l=0

x-22+Y: -5

best wishes

Dr. KhalidM. MOhammed

2017

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