Hailey C.
asked 02/14/17function question
given the functions h(x0=absvalue(x-4)+1 and k(x)=x^2+3, which intervals contain a value of x for which h(x)=k(x)? Select all that apply:
A-4.5less than x less than-3
B.-3less thanxlessthan-1.5
C -1.5less than x less than 1.5
D1.5less than x less than 3
E 3 less than x less than 4.5
More
1 Expert Answer
Mark M. answered 02/14/17
Tutor
4.9
(954)
Retired math prof. Calc 1, 2 and AP Calculus tutoring experience.
h(x) = l x-4 l + 1
If x<4, then h(x) = 4-x+1 = 5-x So, h(x) = k(x) when x2+3 = 5-x
x2+x-2=0
(x+2)(x-1) = 0
x = -2 or 1
If x≥4, then h(x) = x-4+1 = x-3 So, h(x) = k(x) when x2+3 = x-3
x2-x+6 = 0
(no real solutions)
B and C both work.
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Michael J.
02/14/17