d = 2j+ 5 k, b = 4i+3j+7k, č = 31+4j, ý = -8i+3j Perform the following operations on these vectors: a) 7 ·ā + à ·ÿ = 14 5) (ä · 5) a = 4sqrt(109) =) ((7 · 7) a) · ā = 4sqrt(10081)

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