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Maths Five MCQs

Question # 00010565
Subject: Mathematics
Due on: 03/20/2014
Posted On: 03/20/2014 01:54 AM

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1. What is the natural domain of the function f(x) = 2x -1?
a. All of the real numbers
b. X = 0.5
c. All real numbers except x = 0.5
d. All positive real numbers
2. Suppose f(x) = x^2 + 1 (Note that ^ is the power of function; x^2 represents “x squared”) Whicch one of the following represents f(f(x))?
a. f(f(x)) = (x^2 + 1)^2 +1
b. f(f(x)) = (x^2 +1)^2
c. f(f(x)) = x^4 + 2x^2 + 1
d. f(f(X)) = x^4 + 1
3. Consider the following unit circle.

Which one of the following is FALSE?
a. y 0 = sin (T)
b. x 0 = cos(t)
c. cos(-t) = cos(t)
d. sin(-t) = sin(t)
4. The matlab command for finding the limit of an expression y as x tends to c is: >> limit(y,x,c)
Matlab uses Nan to say a limit does not exist, and Inf to say a limit is infinity. The Matlab function for absolute value is abs(x); this gives IxI.
a. 0
b. Inf
c. NaN
d. 1
5. A piecewise function f is defined by:
F(x) = x + k when x is less than 1, and
F(x) = 3 otherwise.
What value of k makes f continuous at x =1?
a. 1
b. No value of k
c. 3
d. 2

Tags mcqs maths function following limit real value represents matlab infinity absolute domain absx exist does tends gtgt limityxcmatlab uses gives ixia andfx otherwisewhat makes continuous byfx defined infc nand piecewise expreion numbersb

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Tutorial Preview …>> xxxxxxxxxxxx Matlab xxxx Nan to xxx a limit xxxx not xxxxxx xxx Inf xx say a xxxxx is infinity xxx Matlab xxxxxxxx xxx absolute xxxxx is abs(x); xxxx gives IxI x 0 x xxx c xxx d 1 x A piecewise xxxxxxxx f…
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Preview: 1)^2 xxxxxxxxx = xxxx +1)^2f(f(x)) = xxx + 2x^2 x 1f(f(X)) x xxx + xxxxxxxxx the following xxxx circle Which xxx of xxx xxxxxxxxx is xxxxxxx 0 = xxx (T)x 0 x cos(t)cos(-t) x.....
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