Question

Q5. For all values of x, b) Solve fg(x) = gf(x)
g(x)=x-5
f(x)=x²+1​

Answer 1

To solve fg(x) = gf(x), we need to find the values of x that satisfy this equation. First, let's calculate fg(x):fg(x) = f(g(x)) = f(x-5) = (x-5)² + 1 Now, let's calculate gf(x):gf(x) = g(f(x)) = g(x² + 1) = (x² + 1) - 5 = x² - 4So, we have the equation:(x-5)² + 1 = x² - 4 Expanding (x-5)², we get:x² - 10x + 26 = x² - 4 Simplifying, we get:-10x + 26 = -4-10x = -30x = 3 Therefore, the solution to fg(x) = gf(x) for all values of x is x = 3.