A2 June 2020 Paper 1 Q1

1 Which of the integrals below is not an improper integral?

Circle your answer. [1 mark]

• \[\int_0^{\infty} \mathrm{e}^{-x}\,\mathrm{d}x\]
• \[\int_0^{2} \frac{1}{1 - x^2}\,\mathrm{d}x\]
• \[\int_0^{1} \sqrt{x}\,\mathrm{d}x\]
• \[\int_0^{1} \frac{1}{\sqrt{x}}\,\mathrm{d}x\]