Complete:

In {1, 4, 7, ... }, $x$₉= __________.

Complete:

In {a, a+d, a+2d, a+3d, ... }, d is __________.

Complete:

{3,5,7,…} is a __________.

Complete:

In {a, a+d, a+2d, a+3d, ... }, a is __________.

Complete:

In {2, 5, 8, ... }, $x$₁₀= __________.

Is the sentence true or false?

In General we can write an arithmetic sequence like this:

{a, a+d, a+2d, a+3d, ... }.

Complete:

In {1, 6, 11, 16, ... }, d= __________.

Complete:

In {1, 6, 11, 16, ... },  a₅= __________.

Complete:

In {2, 5, 8, ... },d= __________.