Show that dim(W1) + dim(W2) – dim(W1 n W2) = dim(W1 + W2), where W1 + W2 just denotes the span of W1 u W2 in V. (Hint: Apply the rank nullity theorem to the natura map Wi O W2 → V.)

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A: Note:  As you requested only Part C(I) so I answered here only that.

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