I really need help 50 POINTS AND WILL BE MARKED BRAINLIEST
ONLY if your answer shows steps and is logical
If it is obviously incorrect, it will be reported

a. Find the domain and range of f(x)=2log_3(x^2-4x-5)

b. find the domain and range of the function f(x)=5/(2+3^x)

c. If 8^x=27, then what is 4^(2x-3)
I'm sorry I'm du. mb?

rounding to the nearest thousandth would be 452,000

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

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