Question

funçao f(x)=3x+1
a) f(0) b) f(-1) c) f(-20) d) f(1/4)

Answer 1

a)f(0)=3.0+1 =0+1 =1

b)f(-1)=3(-1)+1 =-3+1 =-2

c)f(-20)=3(-20)+1 =-60+1 =-59

d)f(1/4)=3(1/4)+1 = 3/4+1 =7/4

Answer 2

a)

f(x) = 3x + 1

x = 0
f(x) = 3x + 1
f(0) = 3.0 + 1
f(0) = 0 + 1
f(0) = 1
----------------------------------
b)
x = - 1
f(x) = 3x + 1
f(-1) = 3.(-1) + 1
f(-1) = - 3 + 1
f(-1) = - 2
----------------------------------------
c)
f(-20) = 3.(-20) + 1
f(-20) = - 60 + 1
f(-20) = - 59
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d)

f(1/4) = 3. 1   + 1
                ---
                 4

f(1/4)  =  3
             -----  + 1
               4

mmc = 4

f(1/4) = 3 + 4
            ---------
                4

f(1/4) = 7/4