Sequences & Series Quiz

Question 1

An arithmetic sequence has first term $a_1=7$ and common difference $d=3$. What is $a_5$?

Accepted Answer

$19$

Answer

$16$

Answer

$22$

Answer

$28$

Question 2

Which expression equals $\displaystyle \sum_{k=1}^{n} (2k-1)$?

Accepted Answer

$n^2$

Answer

$\frac{n^2}{2}$

Answer

$n(n-1)$

Answer

$2n^2-1$

Question 3

A ball is dropped from $20$ m and bounces back to $80\%$ of its previous height each time. What is the total vertical distance traveled after infinitely many bounces?

Accepted Answer

$180$ m

Answer

$100$ m

Answer

Diverges

Answer

$160$ m

Sequences & Series Quiz

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