Numerical Sequence Patterns · SSAT Upper Level Quantitative · Flashcards

QUESTION

What is the

n

th-term formula for an arithmetic sequence with first term

a_1

and common difference

d

?

QUESTION

What is the explicit formula for the

n

th triangular number

T_n

?

QUESTION

What is the

n

th-term formula for a geometric sequence with first term

a_1

and ratio

r

?

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