Quay lại đáp án

	2	thêm 20 ký tự trong đáp án		Sửa 08-02-14 08:04 AM ♥♥♥ Panda Sơkiu Panda Mập ♥♥♥ 1
$a)$ có các trường hợp sau: $TH1:1$ phần tử: $=>1$ tập hợp $TH2:2$ phần tử $=>1.8=8$ $TH3:3$ phần tử $=>1.C^{2}_{8}$ $TH4:4$ phần tử: $=>1.C^3_8$ $TH5:5$ phần tử $=>1.C^4_8$ $TH6:6$ phần tử $=>1.C^5_8$ $TH7:7$ phần tử $=>1.C^6_8$ $TH8:8$ phần tử $=>1.C^7_8$ $A$ có $9$ phần tử $=>$ bỏ $9=>8$ phần tử để xét $a)$ có các trường hợp sau: $TH1:1$ phần tử: $=>1$ tập hợp $TH2:2$ phần tử $=>1.8=8$ $TH3:3$ phần tử $=>1.C^{2}_{8}$ $TH4:4$ phần tử: $=>1.C^3_8$ $TH5:5$ phần tử $=>1.C^4_8$ $TH6:6$ phần tử $=>1.C^5_8$ $TH7:7$ phần tử $=>1.C^6_8$ $TH8:8$ phần tử $=>1.C^7_8$ $A$ có $9$ phần tử $=>$ bỏ $9=>8$ phần tử để xét $a)$ có các trường hợp sau: $TH1:1$ phần tử: $=>1$ tập hợp $TH2:2$ phần tử $=>1.8=8$ $TH3:3$ phần tử $=>1.C^{2}_{8}$ $TH4:4$ phần tử: $=>1.C^3_8$ $TH5:5$ phần tử $=>1.C^4_8$ $TH6:6$ phần tử $=>1.C^5_8$ $TH7:7$ phần tử $=>1.C^6_8$ $TH8:8$ phần tử $=>1.C^7_8$ $A$ có $9$ phần tử $=>$ bỏ $9=>8$ phần tử để xét

	1	tạo mới		Trả lời 08-02-14 08:03 AM ♥♥♥ Panda Sơkiu Panda Mập ♥♥♥ 1
$a)$ có các trường hợp sau: $TH1:1$ phần tử: $=>1$ tập hợp $TH2:2$ phần tử $=>1.8=8$ $TH3:3$ phần tử $=>1.C^{2}_{8}$ $TH4:4$ phần tử: $=>1.C^3_8$ $TH5:5$ phần tử $=>1.C^4_8$ $TH6:6$ phần tử $=>1.C^5_8$ $TH7:7$ phần tử $=>1.C^6_8$ $TH8:8$ phần tử $=>1.C^7_8$ $A$ có $9$ phần tử $=>$ bỏ $9=>8$ phần tử để xét

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