The term to term rule is the difference between the numbers in the sequence, like this:-2, 4, 6, 8the gap is 2+ so your answer would be=+2but if you have a question like this:-1, 4, 9, 16 you need to...
The symbol is two parallel, vertical lines. I don't believe that it is directly related to the equal symbol; although it is possible that the vertical position was chosen precisely to avoid confusion.
Grouping symbols are symbols such as parentheses or brackets, that indicate that the operations within them should be done first. When an expression contains more than one pair of grouping symbols,...