Kategorier: Alla - progression

av Emir Mnassri för 1 år sedan

197

suite

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suite

suite

U1=U0+(1-0)*2
Un=Up+(n-p)*r
S=(n+1)+(Uo+Un)/2
S=(n-0+1)+(Uo+Un)/2
S=NT*(PT+DT)/2

arith

U0+U2=2U1
r=U1-U0
Un=Uo+nr

r.de termes quelquons

U1=U0*2**(1-0)
Un=Up*q**(n-p)

somme

S=Uo*(1-q**n+1)/1-q
S=Uo*(1-q**n-0+1)/1-q
S=PT*(1-q**NT)/1-q

géo

Uo*U2=U1**2
q=U1/Uo
Un=Uo*q**n