4.11.1 Vectors (A-level only)

Given that $∣12i+kj+3k∣=13|12\mathbf{i} + k\mathbf{j} + 3\mathbf{k}| = 13$

Find the two possible values of $k$

[3]

Given that $∣12i+kj+3k∣=13|12\mathbf{i} + k\mathbf{j} + 3\mathbf{k}| = 13$

Find the two possible values of $k$

[3]

4.11.1 Vectors (A-level only) Questions