In a large lecture hall, students were handed a drawing of a woman. Students didn’t know that those on the left side of the center aisle received a drawing of a young woman while those on the right side of the aisle were given a drawing of an old woman. A slide was then projected with an drawing that was an ambiguous combination of the two handouts and students were asked a series of questions.

This is an example of which of the following?

A. A blind observational study
B. An observational study that isn’t blind
C. A blind experiment
D. An experiment that isn’t blind

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! : )

cretdit to source

y=sec x is the correct answer

~batmans wife dun dun