énoncés lycée

Exercice 1. (a, b, c, d)
abcd = 98
(98,1,1,1) (1,1,98,1)
Exercice 2. 10 ×10
Exercice 3.
Exercice 4. 150◦
2017 180◦
Exercice 5. n16n61010
k= 1,2,...,10 n k
Exercice 6. (A, B)
{1,2,...,10}A∩B=∅
A6=B(A, B)6= (B, A)
Exercice 7.
Exercice 8. a a2+a+ 100
Exercice 9. x, y, z ABC
16HN2=xBC2+yCA2+zAB2H A M
[BC]N[AM ]x2+y2+z2
Exercice 10. ABC 16 r
r r =√a−b a b a +b
Exercice 11. a<b<c 2016x3−4x+3
√2016 = 0
−1/(ab2c)
Exercice 12. u1= 17 ×(1 + 2) u2= 172×(2 + 2)
un= 17n×(n+ 2) n>1a b
un+2 =aun+1 +bunn a2−b