Q. The functionsf and g are defined asf(x)=x−2,g(x)=x+3.a) Find the domain of f,g,f+g,f−g,fg,f2,g0, and g1.b) Find g2,g3,g4,g5,g6, and g7.
Find Domain of f(x): To find the domain of f(x)=x−2, we need to determine the set of all x-values for which f(x) is defined.Since f(x) is a polynomial function, it is defined for all real numbers.
Find Domain of g(x): To find the domain of g(x)=x+3, we need to determine the set of all x-values for which g(x) is defined.The square root function is defined for non-negative arguments, so x+3 must be greater than or equal to 0.Solving the inequality x+3≥0 gives us x≥−3.Therefore, the domain of g(x) is all real numbers x such that x≥−3.
Find Domain of f+g: To find the domain of f+g, we need to find the intersection of the domains of f and g. Since the domain of f is all real numbers and the domain of g is x≥−3, the domain of f+g is x≥−3.
Find Domain of f−g: To find the domain of f−g, we again find the intersection of the domains of f and g. The domain of f−g is also x≥−3.
Find Domain of fg: To find the domain of fg, we find the intersection of the domains of f and g.The domain of fg is x≥−3.
Find Domain of f ullet f: To find the domain of f ullet f (f composed with f), we consider the domain of f, which is all real numbers. Since f is defined for all real numbers, the domain of f ullet f is also all real numbers.
Find Domain of (f)/(g): To find the domain of (f)/(g), we need to find the intersection of the domains of f and g, and exclude any x-values for which g(x)=0.Since g(x)=x+3, g(x) is zero when x=−3.Therefore, the domain of (f)/(g) is (f)/(g)0.
Find Domain of (g)/(f): To find the domain of (g)/(f), we need to find the intersection of the domains of f and g, and exclude any x-values for which f(x)=0.Since f(x)=x−2, f(x) is zero when x=2.Therefore, the domain of (g)/(f) is (g)/(f)0 and (g)/(f)1.
Calculate (f+g)(x): Now we will calculate (f+g)(x)=f(x)+g(x)=(x−2)+x+3.
Calculate (f−g)(x): Next, we calculate (f−g)(x)=f(x)−g(x)=(x−2)−x+3.
Calculate (fg)(x): Then, we calculate (fg)(x)=f(x)⋅g(x)=(x−2)⋅x+3.
Calculate (ff)(x): For (ff)(x), we calculate f(f(x))=f(x−2)=(x−2)−2=x−4.
Calculate (gf)(x): To calculate (gf)(x), we find g(x)f(x)=x+3x−2, for x > -3.
Calculate (fg)(x): Finally, to calculate (fg)(x), we find f(x)g(x)=x−2x+3, for x≥−3 and x=2.
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