Arithmetic and geometric progressions, sum to n terms, applications.
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Q1 · Progressions · EASY
The 10th term of the arithmetic progression 2, 5, 8, 11, ... is:
Q2 · Progressions · MEDIUM
Which term of the arithmetic progression 21, 18, 15, 12, ... is -81?
Q3 · Progressions · MEDIUM
The sum of the first 20 terms of the arithmetic progression 5, 8, 11, 14, ... is:
Q4 · Progressions · HARD
If the 5th term of a geometric progression is 48 and the 8th term is 384, then the common ratio is: