7/25/2019 Teza Sem.idec2014cl.a Viiia

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SCOALA GIMNAZIALA. NUME

ELEV.

DISCIPLINA : MATEMATICA CLASA a VIII-

a/DATA

TEZA SEM. I- DEC. 2014

Partea I

10p 1.Ca!"at# :a

1

2+2

3+4

5=; b1,6+1, (6 )+1,1 (6 )=; c2+818=

10p 2.C$%parat# : a22cu3 ;b35 cu211;c2332cu0 ;d 456 2cu0

10p 3.Sta#t# 'a!a :a

3

5 (0,6 ;0,7 )b2 [2;2 ] c3 (2;2) [1 ;1 ]

10p 4.Ca!"at# : ax+2x+3x4x=; b (2x3 ) (32x )=; c (9x2+6x ) : (3x+2 )=;unde3x+20

10p 5.De(!$%p")et# #) *a!t$r# : a16x2

25=; bx2

12x+36=; cx3

+8=; dx2

+7x+12=

1+p 6. E(x )=( 1x1+ 1x+2 2xx2+x2 ):

1

x21 ,

adeterminati DR pe care expresia este definita;

baducetiexpresia laforma ceamai simpla ; cdeterminati xZ pentru care E(x )Z .

1+p 7.Se !$)(#'era !"&" ACDACD !" %"!#a 'e 4 !% , a aat# ("%a ")#%#$r t"t"

'#a$)ae$r !"&""# ,

b aat# %a("r#e ")#"r#$r '#)tre 'reptee A , CD 3 , A , C 3 , A,C 3 ,

D 3 .

20p 8.Se !$)(#'era tetrae'r" re"at ACD !" %"!#a 'e !% , a3 aat# #)at#%ea tetrae'r"

&3 aat# ap$te%a

tetrae'r""# , !3 'eter%#)at# %a("ra ")#""# '#)tre A (# CD , '3 'eter%#)at# '#(ta)t

a p")!t" a

pa)" CD3 .

D#) $5!#"6 10 p")!te 7