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Q43Section C (Section C)43 of 60

Dimension of equal first two coordinates

Let V={(x1,x2,x3,x4)∈R4:x1=x2}V=\{(x_1,x_2,x_3,x_4)\in\mathbb{R}^4:x_1=x_2\}. Consider VV as a subspace of R4\mathbb{R}^4 over the real field. Then the dimension of VV is equal to __________ (answer in integer)

Numerical answer: type the number (no options).

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