donner la racine carrée de chaque nombre : 1/121 ;1/16; 49/1000000; 1/36 ; 25/9; 100/81;4900;400;0.25;1.44; 810000;0.0009 on n'a pas fait la leçon merci
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Bonjour,C'est simple en fait : √(a/b) = (√a)/(√b) et √(a×b) = √a×√b
√(1/121) = (√1)/(√121) = 1/11
√(1/16) = (√1)/(√16) = 1/4
√(49/1 000 000) = (√49)/(√1000000) =7/1000
√(1/36) = (√1)/(√36) = 1/6
√(25/9) = (√25)/(√9) = 5/3
√(100/81) = (√100)/(√81) = 10/9
√4900 = √(49×100) = √49 × √100 = 7×10 = 70
√400 = √(4×100) = 2×20 = 20
√0,25 = √(1/4) = √1/√4 = 1/2 = 0,5
√1,44 = √(144×0,01) = 12×0,1 = 1,2
√810000 = √(81×10000) = 9×100 = 900
√0,0009 = √(0,03×0,03) = 0,03