Các câu hỏi tương tự
tinh nhanh 34676 x 83247 + 8768 x 67878 = bao nhieu
tinh nhanh 133 x 437 + 453 = bao nhieu
1. x^10 = 1^x
x^10 = x
(2*x-15)^5 = (2*x-15)^3
2. a co bao nhieu chu so ?
10^20 < a<10^21
3. Cho a = 1+2^2+2^3+..................+2^50
a)Tinh 2a
b)Tinh 2a-a
c)Chung minh a+1 la luy thua cua 2
a, co bao nhieu cap so nguyen ( x,y ) thoa man x + y=1
b. co bao nhieu cap so nguyen ( x,y ) thoa man x.2 + y =1
1.Moi tap hop sau co bao nhieu phan tu
a)A={x€N/x-8=10}
b)B={x€N/x+5=5}
c)C={x€N/x×0=0}
d)D={x€N/5<x<6}
2.Viet tat ca cac tap hop con (khac rong )cua tap hop B:B={a,b,c}
3.Cho tap hop A={10,13,16,.......,100}
a)Tinh so phan tu cua tap hop A.
b)Tinh tong cac phan tu cua A.
Nho giup minh nha
113.(tr99,ko hieu dc trong sach nha) 54 0Hay dien cac so 1,-1,2,-2,3,-3,vao cac o trong o hinh vuong ben(moi so vao 1 o ) sao cho tong 3 so tren moi dong,moi cot hoac moi duong cheo deu bang nhau114.Liet ke va tinh tong tat ca cac so nguyen x thoa man:a) -8 x 8 b) -6 x 4 c) -20 x 21118.Tim so nguyen x biet :a) 2x - 35 15 ; b) 3x + 17 2; c) | x - 1 | 0119. Tinh bang 2 cach:a) 15 x 12 - 3 x 5 x 10 ...
Đọc tiếp
113.(tr99,ko hieu dc trong sach nha)
| 5 | ||
| 4 | 0 |
Hay dien cac so 1,-1,2,-2,3,-3,vao cac o trong o hinh vuong ben(moi so vao 1 o ) sao cho tong 3 so tren moi dong,moi cot hoac moi duong cheo deu bang nhau
114.Liet ke va tinh tong tat ca cac so nguyen x thoa man:
a) -8 < x < 8 b) -6 < x < 4 c) -20 < x < 21
118.Tim so nguyen x biet :
a) 2x - 35 = 15 ; b) 3x + 17 = 2; c) | x - 1 | = 0
119. Tinh bang 2 cach:
a) 15 x 12 - 3 x 5 x 10 b) 45 - 9 x ( 13 + 5 ) c) 29 x ( 19 - 13 ) - 19 x ( 29 - 13 )
120. Cho 2 tap hop : A = { 3;-5;7} ; B = { -2;4;-6;8}
a) Co bao nhieu tich ab ( voi a thuoc A va b thuoc B ) duoc tao thanh?
b) Co bao nhieu tich lon hon 0,bao nhieu tich nho hon 0?
c) Co bao nhieu tich la boi cua 6?
d) Co bao nhieu tich la uoc cua 20?
Giup mk nha may bn dang can gap
tim x ( 845 x 877 ) x + 538 = 3498 bao nhieu
(x+6)*(x-32)<0
x bang bao nhieu?
Cho x thuoc N* , x<32 . Hoi co bao nhieu x