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Sagot :
Answer:
Step-by-step explanation:
when it says a sequence is arithmetic, it means that is has a common difference and come in the form a+(n-1)d, where a is the first term of the sequence, n is the number of terms and d is the common difference (the difference between each term.
example: 6, 3, 0, -3, -6
the common difference is 3, therefore its form is 6+(n-1)(-3) = 9-3n
if u wanted to find the 7th term in the sequence ([tex]a_7[/tex]), you'd put 7 in place of n in the equation.
geometric sequences have common ratios and come in the form ar^n-1
where a is the first term, r is the common ratio (basically the common difference but in the form of a fraction) and n is the number of terms.
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