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Maths Five MCQs




Question;1. What is the natural domain of the function f(x) = 2x -1?a. All of the real numbersb. X = 0.5c. All real numbers except x = 0.5d. All positive real numbers2. 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 +1b. f(f(x)) = (x^2 +1)^2c. f(f(x)) = x^4 + 2x^2 + 1d. f(f(X)) = x^4 + 13. 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. 0b. Infc. NaNd. 15. A piecewise function f is defined by:F(x) = x + k when x is less than 1, andF(x) = 3 otherwise.What value of k makes f continuous at x =1?a. 1b. No value of kc. 3d. 2


Paper#61092 | Written in 18-Jul-2015

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