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Educational Level

Secondary school, High school and College 
Program Purpose

Provide step by step solutions of your problems using online calculators (online solvers)

Problem Source

Your textbook, etc 

2
Solve simultaneous equations

Solve simultaneous equations using
1. Inverse Matrix method
2. Cramer's Rule method
3. Gauss Elimination method
4. Gauss Sield method
Solve the following equations
1. 2x + y + z = 10, 3x + 2y + 3z = 18, x + 4y + 9z = 16
2. 2x+5y=16, 3x+y=11
3. 2x+5y=21, x+2y=8
4. 2x+y=8, x+2y=1
5. 2x+3yz=5, 3x+2y+z=10, x5y+3z=0
6. x+y+z=3, 2xyz=3, xy+z=9
7. x+y+z=7, x+2y+2z=13, x+3y+z=13
8. 2xy+3z=1, 3x+4y5z=0, x+3y6z=0



3.
Numerical Differentiation

Numerical Differentiation using Newton's Forward, Backward Method
1. From the following table of values of x and y, obtain `(dy)/(dx)` and `(d^2y)/(dx^2)` for x = 1.2 .
x 
1.0 
1.2 
1.4 
1.6 
1.8 
2.0 
2.2 
y 
2.7183 
3.3201 
4.0552 
4.9530 
6.0496 
7.3891 
9.0250 
2. From the following table of values of x and y, obtain `(dy)/(dx)` and `(d^2y)/(dx^2)` for x = 2.2 .
x 
1.0 
1.2 
1.4 
1.6 
1.8 
2.0 
2.2 
y 
2.7183 
3.3201 
4.0552 
4.9530 
6.0496 
7.3891 
9.0250 


4.
Numerical Integration

Numerical Integration using Trapezoidal, Simpson 1/3, Simpson
3/8 Rule
1. From the following table, find the area bounded by the curve and x axis from
x=7.47 to x=7.52 using trapezodial, simplson 1/3, simplson 3/8 rule.
x 
7.47 
7.48 
7.49 
7.50 
7.51 
7.52 
f(x) 
1.93 
1.95 
1.98 
2.01 
2.03 
2.06 
2. Evaluate I = `int_0^1 (1)/(1+x) dx` by using simpson's rule with h=0.25 and h=0.5



5.
Numerical Interpolation

Numerical Interpolation using Forward, Backward Method
1. The population of a town in decimal census was as given below. Estimate population for the year 1895.
Year 
1891 
1901 
1911 
1921 
1931 
Population
(in Thousand) 
46 
66 
81 
93 
101 
2. Let y(0) = 1, y(1) = 0, y(2) = 1 and y(3) = 10. Find y(4) using newtons's forward difference formula.
3. In the table below the values of y are consecutive terms of a series of which the number 21.6 is the 6th term. Find the 1st and 10th terms of the series.
X 
3 
4 
5 
6 
7 
8 
9 
Y 
2.7 
6.4 
12.5 
21.6 
34.3 
51.2 
72.9 
4. The population of a town in decimal census was as given below. Estimate population for the year 1895.
X 
0.10 
0.15 
0.20 
0.25 
0.30 
tan(X) 
0.1003 
0.1511 
0.2027 
0.2553 
0.3073 
Find (1) tan 0.12 (2) tan 0.26
5. Certain values of x and log10x are (300,2.4771), (304,2.4829), (305,2.4843) and (307,2.4871). Find log10 301.
6. Find lagrange's Inerpolating polynomial of degree 2 approximating the function y = ln x defined by the following table of values. Hence find ln 2.7
X 
2 
2.5 
3 
ln(X) 
0.69315 
0.91629 
1.09861 
7. Using the following table find f(x) as polynomial in x
x 
1 
0 
3 
6 
7 
f(x) 
3 
6 
39 
822 
1611 







