Edexcel C1 — Question 1

Exam BoardEdexcel
ModuleC1 (Core Mathematics 1)
TopicIndices and Surds
  1. (a) Express \(\frac { 21 } { \sqrt { 7 } }\) in the form \(k \sqrt { 7 }\).
    (b) Express \(8 ^ { - \frac { 1 } { 3 } }\) as an exact fraction in its simplest form.
  2. Evaluate
$$\sum _ { r = 10 } ^ { 30 } ( 7 + 2 r ) .$$
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