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Descompuneti in factori primi numerele
a.21,30,45,51
b.120,144,180,210
c.1001,1331,2480,5880


Răspuns :

21= 7¹·3¹
30=3¹·2¹·5¹
45=3²·5¹
51=3¹·17¹

120=2³·3¹·5¹
144=2⁴·3²
180=2²·3²·5¹
210=2¹·3¹·5¹·7¹

nu mai am baterie, sorry.