急! F5 translation 問題

Let f(x) = 5^x + 3x + 1
and g(x) be the transformation of f(x) under each of the following transformations.

Find g(x) for each of the following.

a) translated upward by 8 units
g(x) = f(x) + 8
　　= 5^x + 3x + 1 + 8
　　= 5^x + 3x + 9

b) translated downward by 6 units
g(x) = f(x) - 6
　　= 5^x + 3x + 1 - 6
　　= 5^x + 3x - 5

c) translated to the left by 4 units
g(x) = f(x + 4)
　　= 5^(x + 4) + 3(x + 4) + 1
　　= 5^x × 5^4 + 3x + 12 + 1
　　= 625(5^x) + 3x + 13

d) translated to the left by 9 units
g(x) = f(x + 9)
　　= 5^(x + 9) + 3(x + 9) + 1
　　= 5^x × 5^9 + 3x + 27 + 1
　　= 1953125(5^x) + 3x + 28

e) enlarge to 4 times along the x-axis
g(x) = f(x / 4)
　　= 5^(x / 4) + 3(x / 4) + 1
　　= 5^(x/4) + 3x/4 + 1

f) enlarge to 2 times along the y-axis
g(x) = 2 × f(x)
　　= 2f(x)
　　= 2[5^x + 3x + 1]
　　= 2(5^x) + 6x + 2

g) reduce to 1/4 times along the y-axis
g(x) = f(x) / 4
　　= [5^x + 3x + 1]/4
　　= (5^x)/4 + 3x/4 + 1/4

h) reduce to 1/7 times along the x-axis
g(x) = f(7 × x)
　　= f(7x)
　　= 5^(7x) + 3(7x) + 1
　　= 78125^x + 21x + 1