kiểm tra một tiết tuần 34

    !"# $%& '()*++*, /0*1234  567*8.9999999999999: ;<99:: (=> ?(<18@AB*1-C'@D4E(F3 I/ TRẮC NGHIỆM: '/G(=>4Khoanh tròn mt chữ cái đứng trước câu trả lời đúng. H,I13BJKLKM*GN.E*1O@.73%B,GHCGP.EQ :BRSJKTS U:SBVSK : I W − BJ I W − K :WBR/JWKR/ H,W&.73X7.E1(Y>@ABKM*<1Z[.E*\].1TII^JSQ:TI U: S II − : I W − :_ H,/UM*<1Z[.E*\].1.73%B,GHCX7KM*<1Z[.E*\].1K`@.1M*>a*b.Q :_^R/V_ U:^RWJ_ : W W / _x x+ − ≥ : _x y+ < H,0UM*<1Z[.E*\].1^ ≤ IS@c*`<.E1(Y>X7 : { } d ISx x ≤ U: { } d ISx x =  : { } d ISx x <   : { } d ISx x ≥ H,SF@%&^*1eB>f.@g1B(KM*<1Z[.E*\].1W^VTh67T+^JWiX7 :T+j+ U:IjTI :TSj_ : h W − j W h H,+13kl /x− RW^m1(^ ≥ _*1]  :klTSR^ U:klTIRW^ :klS^ :klT^ II/ TỰ LUẬN: 'iG(=>4 U7(I'+G(=>4(g(@F@<1Z[.E*\].1LKM*<1Z[.E*\].1%B, BdW^R0J_   'IG4   Kd+ / S − ^V0 'IG4 @dS^RW ≥ /^R# 'IG4 nd I W I S W 0 # x x− − − < 'ILSG4 2d / i Wx− = 'ILSG4 U7(W'IG(=>4]>^%B3@13EoB*\p@ABK(=,*1O@^ − ^ W − IX7%&H> Uqq 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999       !"# $%& '()*++*, /0*1234 I. TRẮC NGHIỆM:'3 điểm4P.E>r(@H,_LSG(=> H, I W / 0 S + F<F.   U  U  II/ TỰ LUẬN: 'iG(=>4 U7(I '+G(=>4 BdW^R0J_ JlVW^J T0 '_LSG4 JlV^J 0 W − JlV^JTW '_LSG4 Kd+ / S − ^V0 JlV / S − ^V0T+ '_LWSG4 JlV / S − ^VTW JlV / S − ^: S / −    ÷   JTW: S / −    ÷   '_LSG4 JlV^J I_ / '_LWSG4 @dS^RW ≥ /^R# ⇔ S^T/^ ≥ #TW '_LSG4 ⇔ W^≥+ '_LWSG4 ⇔ ^ ≥ / '_LWSG4 nd I W I S W 0 # x x− − − < ⇔ 'ITW^4:W − W:#JI − S^ '_LSG4 ⇔ W − 0^ − I+JI − S^ '_LSG4 ⇔ − 0^RS^JI − WRI+ '_LWSG4 ⇔ ^JIS '_LWSG4 2d / i Wx− = ⇔ / − i^lW13s@/ − i^l − W '_LSG4 (g(/ − i^lW ⇔ − i^lW − /l − I ⇔ ^l I i '_LSG4 (g(/ − i^l − W ⇔ − i^l − W − /l − S ⇔ ^l S i '_LSG4 U7(W 'IG(=>4B@c^ − ^ W − IJ_ ⇔ ^ W R^RIV_ ⇔ W I I / W : W 0 0 x x   − + +  ÷   V_ ⇔ W I / W 0 x   + +  ÷   V_'_LSG4 UM*<1Z[.E*\].1.7C@c.E1(Y>6;(>5(^ ∈ .8.%,C\B U(=,*1O@^ − ^ W − I.1`.E(F*\pH>6;(>5(^ '_LSG4 LƯU Ý : học sinh có thể giải nhiều cách khác , nếu đúng cho điểm tối đa