Research Article
Optimized Steffensen-Type Methods with Eighth-Order Convergence and High Efficiency Index
Table 2
Results of convergence under fair circumstances for different derivative-free methods.
| | Guess | | (3.1) | (3.3) | (3.4) | (3.2) | (4.10) | (4.16) |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
0.3
| | | | | | | | |
−0.1
| | | | | | | | |
0.5
| | | | | | | | |
0.2
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
−0.3
| | | | | | | | |
−0.6
| | | | | | | | |
−0.8
| | | | | | | | |
−0.4
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
1.9
| | | | | F. | | | |
2
| | | | | F. | | | |
2.1
| | F. | | | F. | | | |
1.6
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
−1.5
| | | | | | | | |
−1.2
| | | | | | | | |
−1.6
| | | | | F. | | | |
−1
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
0.3
| | | | | | | | |
0.2
| | | | | | | | |
0.1
| | | | | | | | |
0.15
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
−3
| | | | | | | | |
−2.5
| | | | | | | | |
−3.2
| | | | | | | | |
−2.1
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
3
| | | | | | | | |
3.1
| | | | | | | | |
1.4
| | | | | | | | |
1.5
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
0.9
| | | | | | | | |
1.2
| | | | | | | | |
1
| | | | | | | | |
0.3
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
0.9
| | | | | | | | |
1
| | | | | | | | |
0.4
| | | | | | | | |
0.6
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
−0.3
| | | | | | | | |
−0.6
| | | | | | | | |
−0.9
| | | | | | | | |
0.3
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
0.7
| | | | | | | | |
0.5
| | | | | | | | |
0.8
| | F. | | | | | | |
0.4
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
2
| | F. | | | | | | |
0.6
| | | | | | | | |
1
| | | | | | | | |
0.5
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
0.6
| | | | | | | | |
0.55
| | | | | | | | |
0.3
| | | | | | | | |
0.4
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
11.5
| | | | | | | | |
10
| | | | | | | | |
8
| | | | | | | | |
9.2
| | | | | | | |
| | | IT |
8
|
4
|
3
|
3
|
3
|
3
| | | TNE |
16
|
12
|
12
|
12
|
12
|
12
| |
1.5
| | | | | | | | |
1.2
| | | | | | | | |
1.7
| | F. | | | | | | |
0.9
| | | | | | | |
| | | IT |
9
|
4
|
3
|
3
|
3
|
3
| | | TNE |
18
|
12
|
12
|
12
|
12
|
12
| |
−0.1
| | | | | | | | |
−0.2
| | | | | | | | |
−0.3
| | | | | | | | |
0.2
| | | | | | | |
|
|