what is the meaning of i in bmw
BMW The BMW i is a sub-brand of BMW founded in 2011 to design and manufacture plug-in electric vehicles.[53][54] The sub-brand initial plans called for the release of two vehicles; series production of the BMW i3 all-electric car began in September 2013,[55] and the market launch took place in November 2013 with the first retail deliveries in Germany.[56] The BMW i8 sports plug-in hybrid car was launched in Germany in June 2014.[57]
Imaginary number An imaginary number[note 1] is a complex number that can be written as a real number multiplied by the imaginary unit i,[note 2] which is defined by its property i2 = −1.[1] The square of an imaginary number bi is −b2. For example, 5i is an imaginary number, and its square is −25. Zero is considered to be both real and imaginary.[2]