Question

Expression containing 26 terms starts at a + 2b +4c +8d +16 e. What is the sum of all coefficients?

Answer 1

32 f

Answer 2

32 f 64 g 128h 256 i 526j k1024 l 2048

Answer 3

forget the variables. You just want the coefficients, which form the GP
1, 2, 4, ... 2^25
Sn = a(r^n - 1)/(r-1)

Answer 4

yes

Answer 5

no

Answer 6

i dont know