Edexcel C4 June 2011 exam answers review
9x²/(x – 1)²(2x + 1) = A/(x – 1) + B/(x – 1)² + C/(2x + 1) Find the values of the constants A, B and C. (4) ANSWER f(x) = 1/√(9 + 4x²)...
Category: C4
Edexcel C4 january 2011 exam answers review
Use integration to find the exact value of \(\int_{\frac{\pi}{2}}{0} \)xsin2x dx (6) ANSWER The current, I amps, in an electric circuit at time t seconds is given by I = 16 – 16(0.5)t, t≥0...
Edexcel C4 january 2012 exam answers review
The curve C has the equation 2x + 3y2 + 3×2 y = 4×2. The point P on the curve has coordinates (–1, 1). Find the gradient of the curve at P.(5) Hence find...
Edexcel C4 june 2013 exam answers review
Find \( \int x^2e^x dx \)(5) Hence find the exact value of \( \int_{0}^{2} x^2e^x dx \)(2) ANSWER Use the binomial expansion to show that √(1 + x/1 – x) ≈ 1 + x...
Edexcel C4 june 2012 exam answers review
[loop type=”question” series=”1-20″ key=”index” id=”6583″] [content field=”index”][content] [/loop] [IMAGE] Find the values of the constants A, B and C. Hence find \( \int f(x) dx \). (4) Find \( \int_{0}^{2} f(x) dx \), leaving...