alleryStart learning →Which of these is a polynomial function of x?
Af(x) = sqrt(x) + 3
Bf(x) = 2^x + 1
Cf(x) = 1/x + 2
Df(x) = x^3 - 4x + 1
Answer & Solution
Correct answer: D. f(x) = x^3 - 4x + 1
Only x^3 - 4x + 1 uses nonnegative integer powers of x with sums and products alone.
Keep practising Sets, Relations and Functions
Browse all Sets, Relations and Functions questions for CA Foundation, or explore more Quantitative Aptitude topics.
Related questions
As x grows large, (4x^3 + x)/(2x^3 - 7) tends toThe limit of (sqrt(x) - 2)/(x - 4) as x approaches 4 isAs x tends to infinity, (3x^2 - 5)/(6x^2 + x) approachesFor f(x) = |x|, the left limit, right limit and f(0) at x = 0 are allA function is continuous at c if the limit of f(x) as x tends to c equalsLet f(x) = x^2 for x < 1 and f(x) = 2x - 1 for x >= 1. At x = 1, f isf(x) = kx + 1 for x <= 2 and f(x) = 3 for x > 2 is continuous at 2 when k isLet f(x) = (x^2 - 9)/(x - 3) for x not equal to 3. For f to be continuous at 3, f(3) must