七年级少年智力开发报数学专页

2024-11-10 11:51:50
推荐回答(2个)
回答1:

!、1 耀 10.CADAB CBCBC
"、1.x > 1 2.22 < x < 24 3.1,2,3,4
4.320≤ x≤340 5.≥ 6. -2 < x≤3
7.2 < a < 18 8. -2 9.55 10.0 < x < 1
#、1.(1)x≥2;(2)1≤ x < 7,$%&’(.
2.)*+,-. -2 < m < 1,/,01.2m +1.
3.7< x2≤6.
4.(1)!2345678309;
(2):;<=x>?@ABCD!234E!FG0H,IJKL,.(18 +30)x≥1800 -400,).291.M(18 +30)x≤1800 -350.6≤x≤305
24
= x=NO$,PQ x = 30.
RSTUV;<=30>?@ABCD!234E!FG0H.
5. -4≤ a < -3.
6.:CD AW:X= xY,ZCD BW:X=(5 -x)Y,[KL,.6x+5(5 - x)≤28,).2≤ x≤3.M= x=O$,PQ6x+4(5 - x)≥24.
x = 2\ x = 3.
] x = 2^,CD:X5_‘a=6 ×2 +5 ×3 = 27(b9);
] x = 3^,CD:X5_‘a=6 ×3 +5 ×2 = 28(b9).
PQcCD AW:X2Y,B W:X3Y.

回答2:

首先说抄答案是不对的 https://gss0.baidu.com/7LsWdDW5_xN3otqbppnN2DJv/406559581/pic/item/b3eb97fd93e57fb7b801a093.jpg
这是图片 http://hi.baidu.com/406559581/album/item/b3eb97fd93e57fb7b801a093.html 这是空间