It is given that
∣3i+tj+2k∣=7\left|3\mathbf{i} + t\mathbf{j} + 2\mathbf{k}\right| = 7∣3i+tj+2k∣=7
where t t\,t is a constant.
Find the two possible values of ttt.
133 exam-style questions on WJEC A Level Maths 4.11 Vectors (A-level only), covering 4.11.1 Vectors (A-level only) and 4.11.2 Vectors (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.