Question

Dau coroana si 15 puncte! ​

Answer 1

Răspuns:

ab5:ba = 5 rest 25

aplicam teorema impartirii cu rest

ab5=5ba+25

100a+10b+5=50b+5a+25

100a-5a=50b-10b+25-5

95a=40b+20 |:5

19a=8b+4

pentru b=9

19a=8·9+4

19a=76=>a=76:19=>a=4

nr ab=49 si ba=94

verificare:

ab5:ba=495:94

495:94=5

470

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=25