uvsaNNHANoANQu4 ''''l i PrroNG cHo oqc vA oAo r4o oicniNguruc (g6m 01 trang) oE xrElr ru ugc rcf r NAm ugc 2ot9 2020 rrrdl+ roAx rcr6r o Ngey kidm tra i6 thiing 12nFm20l9 Thdi gian 90 phfi fthdng kE tltd[.]
uvsaNNHANoANQu4:'l i PrroNG cHo oqc vA oAo r4o oicniNguruc (g6m 01 trang) oE xrElr ru ugc rcf r NAm ugc 2ot9 -2020 rrrdl+: roAx - rcr6r o Ngey kidm tra: i6 thiing 12nFm20l9 Thdi gian: 90 phfi fthdng kE tltdi Sian phil de) Cia1: (2,0 ifr6m) ThUc hi€n phdp tinh: a 4.52 -81:33 b 450 + (-310)+ l-37Sel +(-140) z'.zs)'l] : c 100 : {2s0 [4so -(z'.rzs Chu2: (2,0 fid@ Timx: 107-7(x+5)=65 b.4(x-1)3 +15=47 a CiuS: (2,5 ili6m) a Thay chflr a, b bdi cric cho vi U cht sti thich hqp dC sd Gab chia cho du nhrmg chia h6t Cho A = { x eN* / x i x i 5, x i vi x < 240 } Hay vi6t tap hSp A dudi dang liQt kO c6c ph6n tu c Tim s6 t.u nhi6n Ciu4 li udc clrung crla hai s5 2n + I vir 3n + voi n e N' (1,5 itidm) Mrinh vuon hinh cht nh4t c6 chi6u ddi 105rn, chi6u rQng 75m Nguoi ta mu5n tr6ng ti6p c6y xung quanh wdn cho m6i g6c vu&n c6 I ciy vd kh-ofurg ciich gita c6y 1i6n ;ilffir]il111 k]hra"e ;6d, gaa2-cdy li6n tii5p *uo ho t6ng si5iay h it nh6t Kii d6 cen trdng sii cdy ld bao nhi6u? Cdu5t (2,0 ifr6@ Tr€n ctrngtia Ax, ldn luqt i6y hai diiim M vi N cho AM = 3cm, AN = 8cm' MN' a Chring-t6 di6m M nim gita hai