cho ham so y=2x
a. tinh f(2);f(-2)
b. ve do thi cua ham so tren
cho ham so y=f(x)=ax.biet f(-3)=2
a, tinh he so a va ve do thi ham so
b, tim x de f(x)=-6,ungvoi gia tri a tim duoc o cau a
Cho ham so y=f(x)=-2x
a, Ve do thi ham so tren mat phang toa do Oxy
b,Tim a biet f(a-4)=6
cho hai ham so y=f(x)=|2x| va y=g(x)=3
a)ve tren cung mot he truc toa do Oxy do thi cua hai ham so do
b)dung do thi ham so tim cac gia tri cua x sao cho |2x|<3
cho ham so y=f(x)=3x .a) Ve do thi ham so b) CMR : diem M(2;6) , N(-1;-3) va O thang hang
cho ham so y=f(x) thoa man dieu kien f(x1+x2)=f(x1)+f(x2) va f(x)-xf(-x)=x+1 voi moi x thuoc R
A CMR M(0,1)thuoc do thi ham so
B Tinh f(2019)
cho ham so y=f(x)=2x va y=g(x)=18/x . khong ve do thi ham so hay tim giao diem cua 2 do thi do
cho ham so y=f(x)=2x va y=g(x)=18/x . khong ve do thi ham so hay tim giao diem cua 2 do thi do
cho ham so y=f(x)=3/5x, diem M thuoc do thi ham so do
a) tinh f(5), f(-10)
b tim a
giup mk vs mk can gap