1 Instructions conditionnelles : la structure if

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P=aX2+bX +c

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(un)n≥1
un= 1 + 1
√2+1 √3+··· +1 √n.
(un)
u K
K= 10, K = 100
(vn)n≥1
vn= 1 + 1
22+1 32+··· +1 n2.
K= 1.6K= 2
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N N
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u0= 0,
u1= 1,
∀n∈N, un+2 =un+1+un
2
(un)
unn