BASCAL

• Arithmetic sequence- List number with definite Pattern
• Common difference- constant difference in all pairs of consecutive or successive numbers.
• Increasing- When Common difference is positive
• Decreasing- When common difference is negative
• nth- the term
• a1- first term
• n- position
• d- common difference
• The word series implies- sum
• arithmetic sequence- 1,2,3,4,5
• arithmetic series- 1+2+3+4+5
• Arithmetic series- Simply the sum of arithmetic sequence
• Summation notation- Simple method for indicating the sum of a finite number of terms in a sequence.
• How many properties of sums we have?

  6
• Geometric sequence is also known as?

  Geometric progression
• Geometric sequence- type of sequence wherein every term except the first tern is generated by multiplying the previous term by a fixed nonzero number called "common ratio"
• Geometric series- examples of finite series with finite sums.
• Geometric series- is the sum of the terms in geometric sequence
• Convergence Geometric Series- infinite geometric series where /r/<1
• Negative 1 is greater than ratio but less than 1 is?

  convergence
• less than negative 1 or ratio is greater than 1 is?

  divergence