Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
tim z,y,z thoa
can x cong can tat ca y tru 1 cong can tat ca z tru 2 bang 1 phan 2 ( x cong y cong z)
tim GTN cua B bang 1 phan x tru can x cong 1
tim x thuoc z de can x cong 1 phan can 3 tru 3 la so nguyen
tinh tong T bang 1 phan can 1 cong can 2 cong 1 phan can 2 cong can 3 cong ... cong den 1 phan can 99 cong can 100
rut gon bien thuc ( can 5 - can 7 ) ^2
rut gon
5/2 can 7
rut gon
can (12-6can3) - can (21-12can3)
Rut gon bieu thuc sau
(15√200 - 3√450 + 2√50) : √10
Minh can sieu nhanh ma phai dung, Thanks truoc nha!!
rut gon
can 16a^4b^6 / can 128a^6b^6 (a<0, bkhac 0)
rut gon (x^2+2x+1)\(x-1)^2:(2x^2+4x+2)\(4x^2-8x+4)
rut gon:
N=2(2x + 5 )^2 - 3(1 + 4x )(1 - 4x)
rut gon bieu thuc (1-2*sin a * cos a)/(sin^2 a - cos^2 a)
