Page 17 - Demo

15Popuni tabelu. 9Jednakost a a 2 = , a %u2208QVa`i:za a > 0, a a 2 =za a = 0, a2 = 0za a < 0, a a 2 = %u2212Zakqu~ujemo da va`i jednakost:a a 2 =Na primer:4 4 2 =0 0 2 =( ) %u22124 4 = %u2212( ) %u2212 = 4 2a %u20131 34 %u20131,2 9a2a2a%u20134 0 44 4 2 =0 0 = 4 4 =0 0 2 =%u20134 0 4%u2212 = 4 4( ) %u22124 4 = 2%u041f%u0440%u043e%u0432%u0435%u0440%u0438 %u0448%u0442%u0430 %u0437%u043d%u0430%u04481. Izra~unaj. a) 9 49 1 144 169 225 256b) 916 2536 19 4964 121144 9100v) 0 0, 1 0 0, 9 1 4, 4 0 1, 6 0 6, 4 0 8, 1 2 5, 62. Izra~unaj. ( ) %u22124 2 372( ) %u2212( ) 6112 0 132 , ( ) %u22120 2 2,Za svaki racionalni broj a va`i: a a 2 =%u0420%u0435%u0448%u0435%u045a%u0430 %u0458%u0435%u0434%u043d%u0430%u0447%u0438%u043d%u0435 x2 = 9 je%u0441%u0443 %u0434%u0432%u0430 %u0431%u0440%u043e%u0458%u0430: 3 %u0438 %u20133.%u0412%u0440%u0435%u0434%u043d%u043e%u0441%u0442 9 %u0458%u0435 %u0441%u0430%u043c%u043e %u0458%u0435%u0434%u0430%u043d %u0431%u0440%u043e%u0458 %u2013 %u0431%u0440%u043e%u0458 3.