鐩搁棞鎺ㄨ枽锛�2019骞翠竴绱氭敞鍐婄祼妲嬪伐绋嬪斧鍩虹鑰冭│鍙冪収渚嬮鍙婅┏瑙ｅ尟绺�

1銆佷竴鍕曢粸鑸囧叐瀹氶粸A(2锛�3锛�1)鍜孊(4锛�5锛�6)绛夎窛闆紝閫欏€嬪嫊榛炵殑杌岃贰鏂圭▼鏄細

(A)2x+2y+5z=0;

(B)4x+4y+10z-63=0;

(C)4x+4y+l0z-61=0;

(D)2z+2y+5z-30=0銆�

绛旀锛氥€怋銆�

瑙ｆ瀽锛氳垏A锛孊绛夎窛闆�锛岃ō鍕曢粸鐐�(x锛寉锛寊)锛屽墖(x-2)2+(y-3)2+(z-1)2=(x-4)2+(y-5)2+(z-6)2锛岃В鍑哄緱( )銆�

2銆佽嫢鍑芥暩(sh霉)f(x)鐨勫皫鍑芥暩(sh霉)鏄痵inx锛屽墖f(x)鏈変竴鍊嬪師鍑芥暩(sh霉)鐐猴細

(A)1+sinx

(B)1-sinx

(C)1+cosx

(D)1-cosx

绛旀锛氥€怋銆�

瑙ｆ瀽锛歠’(x)=sinx锛宖(x)=∫sinxdx=-cosx+c锛宑鐐轰换鎰忓父鏁�(sh霉)锛孎(xi脿n)(x)=∫(-cosx+c)dx=-sinx+cx+c1锛宑1鐐轰换鎰忓父鏁�(sh霉)銆備护c=0锛宑1=1锛屽緱( )銆�

3銆佸湪閫ｆ帴浠舵摖澹撳鐢ㄨ▓绠楃殑寮峰害姊濅欢σbs=Pbs/Abs≤[σbs]涓�锛孉bs鏄寚閫ｆ帴浠剁殑锛�

(A)姗埅闈㈤潰绌�;

(B)鍚嶇京鎿犲闈㈢⿳;

(C)瀵﹂殯鎿犲閮ㄥ垎闈㈢⿳;

(D)鏈€澶ф摖澹撳姏鎵€鍦ㄧ殑姗埅闈㈤潰绌嶃€�

绛旀锛氥€怋銆�

瑙ｆ瀽锛欰bs鏄寚閫ｆ帴浠剁殑鍚嶇京鎿犲闈㈢⿳

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