Đề thi Olympic Tiếng Anh lớp 11 vòng 23 năm 2013 - 2014

Câu 1

What is the amplitude of the function y = (2/3)sin 4x?

Câu 2

Which quadratic function is shown in the accompanying graph?

Câu 3

In the accompanying graph, the shaded region represents set A of all points (x, y) such that x² + y2 ≤ 1. The transformation T maps point (x, y) to point (2x, 4y). Which graph shows the mapping of set A by the transformation T?

Câu 4

If f(x) = 4x⁰ + (4x)^-1, what is the value of f(4)?

Câu 5

What is the domain of the function f(x) = 2x²/(x² - 9)?

Câu 6

Câu 7

If (lg x)/(lg b) = y, then x equals

Câu 8

Which equation models the data in the accompanying table?

Câu 9

The amount of juice dispensed from a machine is normally distributed with a mean of 10.50 ounces and a standard deviation of 0.75 ounce. Which interval represents the amount of juice dispensed about 68.2% of the time?

Câu 10

If θ is an acute angle such that sin θ = 5/13, what is the value of sin 2θ?