Expression containing 26 terms starts at a + 2b +4c +8d +16 e. What is the sum of all coefficients?
6 answers
32 f
32 f 64 g 128h 256 i 526j k1024 l 2048
forget the variables. You just want the coefficients, which form the GP
1, 2, 4, ... 2^25
Sn = a(r^n - 1)/(r-1)
1, 2, 4, ... 2^25
Sn = a(r^n - 1)/(r-1)
yes
no
i dont know