Question
ecrire les expressions suivantes sans radical au denominateur
/ : diviser. V : racine carre
I= 3/V5
J= 6/2V3
K= 4-V6/V6
L= 2V7 - 3V3 / V2
M= 4V8-7 / 2V32
Svp merci
/ : diviser. V : racine carre
I= 3/V5
J= 6/2V3
K= 4-V6/V6
L= 2V7 - 3V3 / V2
M= 4V8-7 / 2V32
Svp merci
Asked by: USER1963
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222 Answers
Answer (222)
bonjour
3 / √5 = 3 √5 / ( √5 )² = 3 √5 / 5
6 / 2 √3 = 6 ( 2 √3 ) / ( 2 √3)² = 12 √3 / 12 = √3
(4 - √6) / √6 = ( 4 - √6 ) ( √6 ) / ( √6 ) ² = 4√6 - 6 / 6 = 4 √6 - 1
(2 √7 - 3 √3) / √2 = ( 2 √7 - 3 √3 ) ( √2) / (√2 )²
= 2 √14 - 3 √6 / 2
= √14 - 3 √6
(4 √8 - 7 ) / ( 2 √32 )²
= ( 4 √8 - 7 ) ( 2 √32 ) / ( 2 √32 ) ²
= 8√256 - 14 √32 / 128
= 128 - 56√2 / 128
= - 56 √2