A signal processor measures the deviation of a frequency signal t t\,t from a set point. The response function R(t)R(t)R(t) is modelled by R(t)=∣3t−a∣−bR(t) = |3t - a| - bR(t)=∣3t−a∣−b, where a a\,a and b b\,b are positive constants with a>ba > ba>b.
Sketch, on separate diagrams, the graphs of the functions defined by:
(i) y=∣3t−a∣y = |3t - a|y=∣3t−a∣
(ii) y=∣3t−a∣−by = |3t - a| - by=∣3t−a∣−b
On each sketch, clearly label the coordinates of the minimum point and the point at which the graph intersects the yyy-axis.
Solve the equation
∣3t−a∣−b=5t |3t - a| - b = 5t ∣3t−a∣−b=5tgiving your answer for t t\,t in terms of a a\,a and bbb.
566 exam-style questions on OCR A Level Maths 1.2 Algebra and Functions, covering 1.2.1 Indices, 1.2.2 Surds, 1.2.3 Simultaneous equations, 1.2.4 Quadratic functions, 1.2.5 Completing the square, 1.2.6 Solving quadratic equations, 1.2.7 Inequalities, 1.2.8 Expressing solutions of inequalities, 1.2.9 Representing inequalities graphically, 1.2.10 Manipulating polynomials, 1.2.11 Simplifying rational expressions, 1.2.12 The modulus function (A-level only), 1.2.13 Graphs of functions, 1.2.14 Sketching curves from equations, 1.2.15 Sketching reciprocal curves, 1.2.16 Interpreting solutions graphically, 1.2.17 Intersection points of graphs, 1.2.18 Proportional relationships, 1.2.19 Graph of the modulus of a linear function (A-level only), 1.2.20 Solving modulus equations graphically (A-level only), 1.2.21 Definition of a function (A-level only), 1.2.22 Inverse and composite functions (A-level only), 1.2.23 Simple graph transformations, 1.2.24 Combinations of graph transformations (A-level only), 1.2.25 Partial fractions (A-level only), and 1.2.26 Models in context. Each one has a worked solution and a mark scheme showing where the marks go.