Question

ex. 5 la orice putere are intodeauna ultima cifra 5
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de la 1 la 20, va rog​

Answer 1

ultima cifra a unui numar se scrie matematic sub forma: u ( numarul dorit) =

$u (5^{1}) =5\\u (5^{2})=5 \\u (5^{3})=5 \\u (5^{4}) =5\\u (5^{5}) =5\\u (5^{5}) =5\\u (5^{6}) =5\\u (5^{7}) =5\\u (5^{8}) =5\\u (5^{9}) =5\\u (5^{10})=5 \\u (5^{11}) =5\\u (5^{12}) =5\\u (5^{13}) =5\\u (5^{14}) =5\\u (5^{15}) =5\\u (5^{16}) =5\\u (5^{17}) =5\\u (5^{18})=5\\u (5^{19})=5\\u (5^{20})=5$

sper ca te-am ajutat! coronita? :)