Question

Observe the number of burgers in each case and match the rule when "n" number of burgers are present.

• A. $\text{2n - 1}$
• B. ${\text{2}}^{n-1}$
• C. $\text{n + 2}$

Answer 1

First case:

Row	1	2	3	n
Number of burgers present	$1=2^0$	$2=2^1$	$4=2^2$	$2^{n-1}$

Second case:

Row	1	2	3	n
Number of burgers present	$1=2\times 1-1$	$3=2\times 2-1$	$5=2\times 3-1$	$2\times n-1$ $=2n-1$

Third case:

Row	1	2	3	n
Number of burgers present	$3=1+2$	$4=2+2$	$5=3+2$	$n+2$