QUIZ MATHS Pakai cara

(1/2 + 1/3 + 1/4 + … + 1/2017) = a

(a + 1/2018)(1 + a) – (1 + a + 1/2018)(a)

= a + a² + 1/2018 + a/2018 – a – a² – a/2018

= a – a + a² – a² + a/2018 – a/2018 + 1/2018

= 1/2018