V on a light bulb means volts. W means watts.
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There is no Roman numeral W. There is I, V, X, L, C, D and M but no W.
I'm assuming you mean the symbol (u) and not 'you'So:u = vw + zWhere vw means v * w (v times w)
yes. not sure of the proof though.
"Vectorial angle" is not a standard term in mathematics. The angle between two vectors v and w is defined as the value theta such that w dot v = v times w times cosine theta. Definitions: w and v are vectors (ordered lists of numbers) of the same dimension n (i.e. both contain n terms). The jth term in w is denoted wj (similarly for v) w dot v = w1v1 + w2v2 +... + wnvn w = square root of w dot w (similarly for w) We always choose theta to be between 0 and pi (i.e. between 0 and 180 degrees), including 0 and pi as possible values of course. If w is a positive multiple of v, theta will be zero. If w is a negative multiple of v, theta will be pi.
V=1/3(l+wl) v=1/3l(1+w) 3v=l(1+w) 3v/(1+w)=l