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juliannabartra
04.02.2020 •
Mathematics
Which of the following is true about the function below? 1/√x+10
a. its domain is(-∞,0]and its range is(0,∞)
b. its domain is(-10,∞) and its range is(0,∞)
c. its domain is(-10, ∞)and its range is(-∞,∞)d. its domain is[-10,∞) and its range is
(-∞,0) u (0,∞)
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Ответ:
we have
we know that
the denominator can not be equal to zero and the term inside the square root can't be negative.
so
the domain is the interval--------> (-10,∞)
-10 < x < ∞
the range is the interval------> (0,∞)
0 < f(x) < ∞
using a graphing tool
see the attached figure
Statements
A. Its domain is (-∞,0] and its range is (0,∞)
The statement is false
B. Its domain is(-10,∞) and its range is(0,∞)
The statement is true
C. Its domain is(-10, ∞)and its range is(-∞,∞)
The statement is false
D. Its domain is[-10,∞) and its range is (-∞,0) U (0,∞)
The statement is false
Ответ:
D x>-3
Step-by-step explanation:
3(-x+2) < 15
-3x + 6< 15 (Subtract 6 from both sides)
-3x < 9 (Divide 3 on both sides)
x>-3 (Flip the inequality because the variable was negative)