f(-4)=(-4)2+\(\dfrac{1}{2}\)=16+\(\dfrac{1}{2}\)=\(\dfrac{33}{2}\)
f(5)=52+\(\dfrac{1}{2}\)=25+\(\dfrac{1}{2}\)=\(\dfrac{51}{2}\)
f(-3\(\dfrac{2}{5}\))=(-3\(\dfrac{2}{5}\))2+\(\dfrac{1}{2}\)=289+\(\dfrac{1}{2}\)=\(\dfrac{579}{2}\)
1. Cho hàm số: y = f(x) = x2 + 4
a, Tính f \(\left(-\dfrac{1}{2}\right)\); f(5)
b, Tìm x khi f(x) = 10
Cho hàm số y=f(X)=\(\dfrac{-2}{5}\)x
a) vẽ đồ thị hàm số
b) tính f(1) ; f(-2)
cho hàm số y=f(x)=2x
a)Tính f(1), f(-1), f(\(\dfrac{1}{2}\)),f(- \(\dfrac{1}{2}\))
b)Vẽ đồ thị của hàm số trên
Bài 2:Tìm x
a) |x-2|-\(\dfrac{3}{5}\)=\(\dfrac{1}{2}\)
b) (x-\(\dfrac{7}{3}\)):\(\dfrac{-1}{3}\)=0,4
c) |x-3|=5
d) (2x+3)\(^2\)=25
e) \(\dfrac{3}{4}\)+\(\dfrac{1}{4}\): x=\(\dfrac{2}{5}\)
f) (x-\(\dfrac{1}{2}\))\(^3\)=\(\dfrac{1}{27}\)
Làm nhanh giúp mik vs ạ(đang rất cần, cảm ơn nhiều ạaa!!!!!)
Cho hàm số \(y=f\left(x\right)=-3x\). Tính \(f\left(\dfrac{-3}{2}\right)\), f(-1)
Cho hàm số y=f(x)=\(\dfrac{-1}{3}\)x
a, Tính f(-1); f(3)
b, Vẽ đô thị của hàm số trên
Bài 14:
a) cho hàm số \(y\)=\(f\)(\(x\))=3\(x\)-1 . Tính \(f\)(0), \(f\)(\(\dfrac{1}{3}\))
Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 + x-x^2f(x)=2+x−x 2 . What is the value of f(-3)f(−3)? Answer: Câu 5 Given a real number aa and a function ff is defined on the real numbers by f(x)=-6\times|3x|-4f(x)=−6×∣3x∣−4. Compare: f(a)f(a) f(-a)f(−a) Câu 6 There are ordered pairs (x;y)(x;y) where xx and yy are integers such that \dfrac{5}{x}+\dfrac{y}{4}=\dfrac{1}{8} x 5 + 4 y = 8 1 Câu 7 Given a negative number kk and a function ff is defined on the real numbers by f(x)=\dfrac{6}{13}xf(x)= 13 6 x. Compare: f(k)f(k) f(-k)f(−k) Câu 8 Given a positive number kk and a function ff is defined on the real numbers by f(x)=\dfrac{-3}{4}x+4f(x)= 4 −3 x+4. Compare: f(k)f(k) f(-k)f(−k). Câu 9 A=(1+2+3+\ldots+90) \times(12 \times34-6 \times 68):(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{1}{6})=A=(1+2+3+…+90)×(12×34−6×68):( 3 1 + 4 1 + 5 1 + 6 1 )= Câu 10 Given that \dfrac{2x+y+z+t}{x}=\dfrac{x+2y+z+t}{y}=\dfrac{x+y+2z+t}{z}=\dfrac{x+y+z+2t}{t} x 2x+y+z+t = y x+2y+z+t = z x+y+2z+t = t x+y+z+2t . The negative value of \dfrac{x+y}{z+t}+\dfrac{y+z}{t+x}+\dfrac{z+t}{x+y}+\dfrac{t+x}{y+z} z+t x+y + t+x y+z + x+y z+t + y+z t+x is
cho hàm số y=f(x)=1-5x, tính : f(1); f(2); f(1/5); f(-3/5)
nhanh giúp mình với ạ !!! TvT
