u = <a, -2, -1> and v = <a, 0, 5>
u • v = (a)(a) + (-2)(0) + (-1)(5) = 20
a2 - 5 = 20
a2 = 25
a = 5 or -5
Sada S.
asked • 04/07/21Find a if u · v =20, u = (a, −2, −1), v = (a, 0, 5).
Find a if u · v =20, u = (a, −2, −1), v = (a, 0, 5).
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