Consider the line with equation OP + td where P = (1,1,0) and d = (-1,2,1). Notice that P is on the line. Let %3D %3D Q = (1,2, –1). Let a denote the projection of PQ onto the line. Find a. a = Select...

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Extracted text: Consider the line with equation OP + td where P = (1,1,0) and d = (-1,2,1). Notice that P is on the line. Let %3D %3D Q = (1,2, –1). Let a denote the projection of PQ onto the line. Find a. a = Select an option X CLOSE proją Pd projpd Q proj PÓ projd PQ |L || || ||