Ta có
15 = \(\sqrt{225}<\sqrt{235}\)
=> 15 < \(\sqrt{235}\)
Ta có
15 = \(\sqrt{225}<\sqrt{235}\)
=> 15 < \(\sqrt{235}\)
bai 1 : tinh
\(\sqrt{49}\); \(\sqrt{-49}\) ; \(\sqrt{0,01}\)
bai 2 : so sanh
a,15 va \(\sqrt{235}\)
b,\(\sqrt{7}\)+ \(\sqrt{15}\)va 7
bai 3 ; tinh hop ly
A = 7,3.10,5-7,3.15+2,7.10,5-15.2,7
bai 4 : so sanh
a, 1,(05) va 0,(31)
b, 3,0(21) va 3,021
c,0,001 va 0,(001)
d,1,(31) va 1,(313)
bai 2: so sanh
a, 15 va \(\sqrt{235}\)
b,\(\sqrt{7}\)+ \(\sqrt{15}\)va 7
Trong cac cau sau day , cau nao dung , cau nao sai ?
a) Neu a la so nguyen thi a cung la so thuc .
b) Chi co so 0 khong la so huu ti duong va cung khong la so huu ti am .
c) Neu a la so tu nhien thi a khong phai la so vo ti .
So sanh cac so sau day 1 cach nhanh chong
A/ 3/4 va 115/14
B/ 2000/1999 a 1998//1999
C/ -17/234 va 1/1995
D/ 23/-15 va -17/-49
bai 4 so sanh cac so thuc
\(\frac{4}{9}va\)0,4(5)
\(\sqrt[2]{3}va\sqrt[3]{2}\)
So sanh cac so sau day 25^50 va 2^300
so sanh cac so sau 0.25^80 va 0.125^90
cho tam giac ABC co A = 90 do AB=6cm Ac= 8cm
a tinh BC
b so sanh cac goc cua tam giac ABC
c lay M thuoc AB , N thuoc AC so sanh BC va MN
So sanh cac so huu ti sau
316/49 va 323/56
-214/317 va -21/36