Solving Equations

Skill 4 Solve Equations

Applet under construction

Skill 5 Two Known Terms

You may have noticed that arithmetic sequences have much in common with straight line graphs.

Compare the sequence u_n=3n+1 with the straight line y=3x+1.

 

What kind of number does n represent in the sequence? What kind of number does x represent in the linear equation?

If you are given two points on a straight line, or if you are given two terms in an arithmetic sequence, you can calculate the equation.

The best algebraic technique for you (the one that makes most sense initially) is often the one that you arrive at yourself. Try the applet, and describe any method you come up with!

 


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