Question

determinati valorile lui x pentru care x7 mai mare decat 67

Answer 1

x7>67
x>6
x∈{7;8;9}

77>67
87>67
97>67

Answer 2

I. Daca x7 e numar, cu bata deasupra:
x7> 67=> x€{ 7,8,9} pt ca x>6
II. Daca x7 e inmultire,adica x*7:
7x> 67
x> 67/7
x> 9,57=> x€{10,11,12,13,14,15,16,17,.....,∞}