If f(x) + f(1/x) = 2, then what is the value of f(x)?

What is the area enclosed by |x| + |y| = 1?

The value of ∫(0 to π/2) sin(x) / (sin(x) + cos(x)) dx is:

If A is a 3x3 matrix and |A| = 5, then |3A| equals:

If a, b, c are in A.P., then e^(a), e^(b), e^(c) are in:

The number of solutions of the equation sin(x) + cos(x) = 2 in the interval [0, 2π] is:

What is the probability of drawing two aces from a standard deck of 52 cards?

If the vectors a = i + 2j + 3k and b = 3i - 2j + k are perpendicular, find the value of λ where b = 3i-2j+λk

The equation of the tangent to the curve y = x^2 at the point (1, 1) is:

The domain of the function f(x) = √(4 - x^2) is: