teza sem.idec2014cl.a viiia
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7/25/2019 Teza Sem.idec2014cl.a Viiia
1/1
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
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