Ôn tập toán 6
Các câu hỏi tương tự
a, tim tat ca cac so nguyen to p sao cho p+11 cung la so nguyen to
b,tim tat ca cac so nguyen to p de p+8,p+10 cung la cac so nguyen to
Tim cac so nguyen to nho hon 200 khi chia cho 42 thi du r la hop so
bai 1
cho bieu thuc A = 5/n+1 voi N THUOC Z
a, de A la phan so thi n co dieu kien gi ?
b , tim tat ca cac gia tri nguyen cua n de gia tri A la 1 so nguyen ?
bai 2
cho bieu thuc M = 6/n-3 voi n thuoc Z .Co bao nhieu gia tri cua n de :
a, M ko phai la phan so
b , M la phan so va cp gia tri nguyen ?
bai 3 viet tap hop cacs so nguyen sao cho :
-12/4 < x <6/3
tim phan so duong a/b nho nhat(a,b thuoc n *) sao cho khi nhan phan so do voi 24/5 va 16/3 deu duoc tich la so tu nhien
Cac ban giup minh nha, mai minh phai di hoc rui!!!
phan tich cac so sau ra thua so nguyen to roi cho biet moi so do chia het cho cac so nguyen to nao?
a) 225
b) 1800
c) 1050
d) 3060
Tim tat ca cac phan so co tu so la -15 lon hon -3/7 va ho hon 5/8
tim tat ca cac phan so co mau so la 12 lon hon -2/3 va nho hon 1/4
a)chung minh 4n+ 1 va 6n+1 la 2 so nguyen to cung nhaub)tim n thuoc N de 9n + 24 va 3n +4 nguyen to cung nhaugiaigia su: UCLN ( 9n + 24;3n+ 4) dsuy ra 9n +24 chia het cho d va 3n + 4 chia het cho dsuy ra 3(3n+4) chia het cho dsuy ra 9n+12 chia het cho dsuy ra ( 9n+24) - ( 9n + 12) chia het cho d12 chia het cho d suy ra d1;d2; d3; d4; d6; d 12( tim cach loai di d2; d3 ; d4; d 6; d12)lam cau a cung giong cau b doan daum chua lam xong cau b dau cac p nho doc ki vao day
Đọc tiếp
a)chung minh 4n+ 1 va 6n+1 la 2 so nguyen to cung nhau
b)tim n thuoc N de 9n + 24 va 3n +4 nguyen to cung nhau
giai
gia su: UCLN ( 9n + 24;3n+ 4) =d
suy ra 9n +24 chia het cho d va 3n + 4 chia het cho d
suy ra 3(3n+4) chia het cho d
suy ra 9n+12 chia het cho d
suy ra ( 9n+24) - ( 9n + 12) chia het cho d
12 chia het cho d suy ra d=1;d=2; d=3; d=4; d=6; d= 12
( tim cach loai di d=2; d=3 ; d=4; d= 6; d=12)
lam cau a cung giong cau b doan dau
m chua lam xong cau b dau cac p nho doc ki vao day
viet cac tap hop sau = cach chi ra tinh chat dac trung cho cac phan tu cua tap hop ?
a, tap hop X cac so tu nhien lon hon 0 va nho hon hoac bang 10 ?
b, tap hop Y cac so tu nhien co 2 chu so ?
c, tap hop M cac so tu nhien16 ; 25 ; 36 ; 49 ; 64 ; 81 ?
tim cac p/so lon hon dfrac{1}{4} ma nho hon dfrac{3}{5} va co mau la 20
tim cac p/so co mau la 150 ma nho hon dfrac{7}{15} nhung nho hon dfrac{12}{25}
bai 3 tim x thuoc N , SAO CHO
a, dfrac{1}{5} dfrac{x}{30}dfrac{1}{4} b, dfrac{5}{8} dfrac{4}{x}
bai 4 : rut gon roi quy dong
a, dfrac{51}{35} , dfrac{60}{108} , dfrac{26}{156}
b , dfrac{165}{270} , dfrac{91}{156} , dfrac{201}{1134}
bt 5 xap xep theo thu tu tang dan
a , dfrac{38}{45} , dfrac{7}{2}, dfrac{17}{20}, dfrac{13}{10}
b...
Đọc tiếp
tim cac p/so lon hon \(\dfrac{1}{4}\) ma nho hon \(\dfrac{3}{5}\) va co mau la 20
tim cac p/so co mau la 150 ma nho hon \(\dfrac{7}{15}\) nhung nho hon \(\dfrac{12}{25}\)
bai 3 tim x thuoc N , SAO CHO
a, \(\dfrac{1}{5}\) <\(\dfrac{x}{30}\)<\(\dfrac{1}{4}\) b, \(\dfrac{5}{8}\) < \(\dfrac{4}{x}\)
bai 4 : rut gon roi quy dong
a, \(\dfrac{51}{35}\) , \(\dfrac{60}{108}\) , \(\dfrac{26}{156}\)
b , \(\dfrac{165}{270}\) , \(\dfrac{91}{156}\) , \(\dfrac{201}{1134}\)
bt 5 xap xep theo thu tu tang dan
a , \(\dfrac{38}{45}\) , \(\dfrac{7}{2}\), \(\dfrac{17}{20}\), \(\dfrac{13}{10}\)
b , \(\dfrac{3}{124}\) , \(\dfrac{1}{41}\), \(\dfrac{5}{207}\), \(\dfrac{3}{83}\)