Question 7
Evaluate:
a) A = 1 + 2 + 3 + 4 + 5 + ... + 2020.
b) B = 2 + 4 + 6 + 8 + ... + 2020.
c) C = 1 + 3 + 5 + 7 + ... + 2019.
d) D = 1 + 2 + 4 + 8 + 16 + 32 + ... + 2048.
e) E = 1 + 3 + 9 + 27 + 81 + ... + 2187.
**Editorial input note:** Enter the values of A, B, C, D, and E in that order, separated by semicolons, with no spaces or thousands separators.
a) A = 1 + 2 + 3 + 4 + 5 + ... + 2020.
b) B = 2 + 4 + 6 + 8 + ... + 2020.
c) C = 1 + 3 + 5 + 7 + ... + 2019.
d) D = 1 + 2 + 4 + 8 + 16 + 32 + ... + 2048.
e) E = 1 + 3 + 9 + 27 + 81 + ... + 2187.
**Editorial input note:** Enter the values of A, B, C, D, and E in that order, separated by semicolons, with no spaces or thousands separators.