Question

Need some help on this problem please!

Answer 1

Answer:

C

Step-by-step explanation:

Since

i = 0 : $5^{0}$ = 1

i = 1 : $5^{1}$ = 5

i = 2 : 5² = 25

i = 3 : 5³ = 125

i = 4 : $5^{4}$ = 625

Hence C generates the correct series

Answer 2

Answer:

$\large\boxed{A.\ \sum\limits_{i=0}^{4}5^i}$

Step-by-step explanation:

$1=5^0\\\\5=5^1\\\\25=5^2\\\\125=5^3\\\\625=5^4\\\\\sum\limits_{i=0}^{4}5^i=5^0+5^1+5^2+5^3+5^4$