Which expressions are equivalent to the one below? check all that apply. 7^3*7^x
a.7^3+x
b.7^3-x
c.(7*x)^3
d.49^3
e.7^3x
f.343*7^x

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio