Question

Find the value of aa for which v=⎡⎣⎢⎢⎢5a−74⎤⎦⎥⎥⎥v=[5a−74] is in the set h=span⎧⎩⎨⎪⎪⎪⎪⎪⎪⎡⎣⎢⎢⎢5−1−5−2⎤⎦⎥⎥⎥,⎡⎣⎢⎢⎢05−2−2⎤⎦⎥⎥⎥,⎡⎣⎢⎢⎢0015⎤⎦⎥⎥⎥⎫⎭⎬⎪⎪⎪⎪⎪⎪h=span{[5−1−5−2],[05−2−2],[0015]}.

Answer 1

I am a little confused, if there any answer thingys? :/