cho bieu thuc 2n+1/n+5(n thuoc Z)
a, tim n de Pco gia tri la 1 so nguyen
b,tim gia tri lon nhat,gia tri nho nhat cua P
cho phan so \(B=\frac{4n+1}{2n-3}\)n thuoc z
a, tim n de phan so B toi gian
b, tim n de B dat gia tri nho nhat , gia tri lon nhat va tinh cac gia tri do.
hai so nguyen duong x,y co tong la 51
a tim gia tri lon nhat cua x.y
b tim gia tri nho nhat cua tich x,y, biet rang x va y deu lon hon 1
Tim gia tri lon nhat va nho nhat cua phan so: ab/a+b
Cho diem O thuoc duong thang xy .Lay diem A tren tia Ox sao cho OA bang 2cm,diem B tren tia Oy sao cho Ob=4cm.Goi M va N theo thu tuva con la trung diem cua OA va OB.Chung to O la trung diem cua AN.Tinh do dai doan thang MN.Tia Mx va Ny la hai tia doi nhau va vi sao? ( cac ban tra loi kem Hinh ve ho minh voi nhe!)
Tim gia tri nho nhat: A= lx-2l +100 ; B= lx=1l +lx-7l -8
Tim gia tri lon nhat: A= -lx-7l -120 ; B= 190- lx-4l + ly+9l
cho A = 1/15 nhan 225/(8+2) + 3/14 nhan 196/(3x+6) (x thuoc Z; x khac -2 )
a) Rut gon A
b) Tim x thuoc Z de A thuoc Z
c) trong cac gia tri nguyen A tim gia tri lon nhat va gia tri nho nhat
cho phan so :\(\frac{6n-4}{2n+3}\)n thuoc z
a, tim n de A dat gia tri la so nguyen
b,tim n de A dat gia tri lon nhat va tinh gia tri do.
giup mk nhe mn:))
Cho cac bieu thuc
A=n+6 phan n-5 va B=3n-9 phan n-6
a/ Tim gia tri nguyen cua n de A, B la phan so ?
b/ Tim gia tri nguyen cua n de A, B co gia tri nguyen?
c/ Tim gia tri nguyen cua n de A, B co gia tri nguyen lon nhat?
cho biet a la so nguyen duong lon nhat co bon chu so va b la so nguyen am nho nhat co ba chu so . Tinh tong a +b
