Question

Tìm UCLN va UC của:

(x+1).(y+2)=7

Answer 1

    <p>a) UCLN(40, 60)</p><p>Ta có: 40 = 2³.5</p><p>60 = 2².3.5</p><p>UCLN(40, 60) = 2².5 = 20</p><p>b) UCLN(13, 20)</p><p>Ta có: 13 = 13</p><p>20 = 2².5</p><p>UCLN(13, 20) = 1</p><p>c) UCLN(36, 60, 72)</p><p>Ta có: 36 = 2².3²</p><p>60 = 2².3.5</p><p>72 = 2³.3²</p><p>UCLN(36, 60, 70) = 2².3 = 12</p><p>d) UCLN(28, 39, 35)</p><p>Ta có: 28 = 2².7</p><p>39 = 39</p><p>35 = 5.7</p><p>UCLN(28, 39, 35) = 1</p>                                            </div>