Use the substitution u=x2+5u = x^2 + 5u=x2+5 to find ∫123x(x2+5)2dx\int_1^2 3x(x^2 + 5)^2 dx∫123x(x2+5)2dx.
221 exam-style questions on WJEC A Level Maths 3.7 Integration (A-level only), covering 3.7.1 Integration (A-level only), 3.7.2 Integration (A-level only), 3.7.3 Integration (A-level only), 3.7.4 Integration (A-level only), 3.7.5 Integration (A-level only), and 3.7.6 Integration (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.