Answer to Question #20554 in Trigonometry for Kristen Woods

Question #20554
Give the domain of the function. 6a. g(x)=x^3-1 6b. f(t)= 10/(t^2-2t-3) 6c. h(x)= square root of 2x+1
1
Expert's answer
2012-12-12T09:17:01-0500
6a. x in (-infinity, +infinity)
6b.find the roots of denominator
t^2-2t-3 = 0
t1=(2+sqrt(4+3*4))/2= 3
t2=(2-sqrt(4+3*4))/2= -1
hence domain is (-infinity, +infinity) except x=3 andx=-1
6c. sqrt(2x+1)
2x+1>0
domain is x>-1/2

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