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Kika45
@Kika45
May 2019
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Bonsoir aidez moi s’il vous plait merci
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aur70
Verified answer
Bonjour
F=(2x-3)²+(x+6)²
F=4x²-12x+9+x²+12x+36=5x²+45
F(5)=(2*5-3)²+(5+6)²=7²+11²=49+121=170
F=890 ⇔ 5x²+45=890 ⇔ 5x²=845 ⇔ x²=169 ⇔ x=13 ou x=-13
volume du cylindre : V=πR²h=π*6²*35=3956.4 cm³
volume d'une boule : V'=4πr³/3=4π*2³/3=33.49 cm³
donc nb=V/V'=3956.4/33.49=118 boules
1 votes
Thanks 1
kika45
Bonjour merci sa * veut dire multiplier?
aur70
oui
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Verified answer
BonjourF=(2x-3)²+(x+6)²
F=4x²-12x+9+x²+12x+36=5x²+45
F(5)=(2*5-3)²+(5+6)²=7²+11²=49+121=170
F=890 ⇔ 5x²+45=890 ⇔ 5x²=845 ⇔ x²=169 ⇔ x=13 ou x=-13
volume du cylindre : V=πR²h=π*6²*35=3956.4 cm³
volume d'une boule : V'=4πr³/3=4π*2³/3=33.49 cm³
donc nb=V/V'=3956.4/33.49=118 boules