4 The equation of a curve is \(y = f ( x )\), where \(f ( x ) = ( 2 x - 1 ) \sqrt { 3 x - 2 } - 2\). The following points lie on the curve. Non-exact values have been given correct to 5 decimal places.
$$A ( 2,4 ) , B ( 2.0001 , k ) , C ( 2.001,4.00625 ) , D ( 2.01,4.06261 ) , E ( 2.1,4.63566 ) , F ( 3,11.22876 )$$
- Find the value of \(k\). Give your answer correct to 5 decimal places.
The table shows the gradients of the chords \(A B , A C , A D\) and \(A F\).
| Chord | \(A B\) | \(A C\) | \(A D\) | \(A E\) | \(A F\) |
| 6.2501 | 6.2511 | 6.2608 | | 7.2288 |
- Find the gradient of the chord \(A E\). Give your answer correct to 4 decimal places.
- Deduce the value of \(f ^ { \prime } ( 2 )\) using the values in the table.