Eliminatoires test de rentrée OFM 2015

1+32
p21 + √16!5
an=1
2n−1−1 2n+ 1 a1= 1 −1 3a2=1 3−1 5
S=a1+a2+a3+··· +a100 201 ×S
a(a−1)(a−2)(a−3) + a2(6 −a)=0
11a
20
1×2
2×2
2×11 11
1×2
6 35 28
a a2−82a
5 + a
b=5a b(a, b)
16a61000
ABCD E, F, G, H [AB] [BC]
[CD] [DA]I, J, K, L [EF ] [F G] [GH] [HE]
AB = 16 IJKL
ABC
\
BAC = 48◦
\
CBA = 17◦
\
BAC [BC]D
\
CDA
ABC A
\
CBA = 61◦E
A ABC EB =EC D
A DB =DC =AB
\
BED