90-S2-Q7 Read more about 90-S2-Q7 Damped system with feedback, exponential function, curve sketching, root of equations, first order equation. [STEP II 1990 Question 7 (Pure)]
90-S1-Q7 Read more about 90-S1-Q7 Substitution, first order equation. [STEP I 1990 Question 7 (Pure)]
87-S3-Q6 Read more about 87-S3-Q6 Forced system of first order equation, explicit solution. [STEP II 1987 Question 6 (Pure)]
