Prove that 1.6 = 1.7 = 2

Originally posted by AThousandYoung

how can you prove something which is obviously wrong? Burtrand Russel has rightly said that mathematics is the queen of science, where there is no scope for inaccuracy unless you resort to pseudologic which may appear correct but which actually is specious logic.

By using some wrong methods like infinite sequences.

You use scientific notation. In scientific notation, there's an uncertainty in the last digit, so 1.6=1.7. To one significant figure, both equal 2.