Paper 1: Pure Mathematics 1 June 2023, Question 5 6 marks
A continuous curve has equation y = f(x).
The table shows corresponding values of x and y for this curve, where a and b are constants.
| x | 3 | 3.2 | 3.4 | 3.6 | 3.8 | 4 |
| y | a | 16.8 | b | 20.2 | 18.7 | 13.5 |
The trapezium rule is used, with all the y values in the table, to find an approximate area under the curve between x = 3 and x = 4
Given that this area is 17.59
show that a + 2b = 51
Reveal mark scheme
Given also that the sum of all the y values in the table is 97.2
find the value of a and the value of b
Reveal mark scheme