Answer:
f (4) = 21
Step-by-step explanation:
the given equation is f (x) = 4x + 5
putting the value of x = 4
we get, f (4) = (4×4) + 5
f (4) = 16 + 5
i hope u got it
x=18
7x-1=125
<u> +1 +1</u>
<u>7x</u>=<u>126</u>
7 7
X=18
Answer: f^1(x)=x/3+4/3