TMUA 2018 Paper 2 Question 7

P2·Sequences & Series·5.5Official · 2018 · Q7
arithmetic-progressioncommon-termslcmmodular-arithmetic
Sequence 1 is an arithmetic progression with first term and common difference . Sequence 2 is an arithmetic progression with first term and common difference . Some numbers that appear in Sequence 1 also appear in Sequence 2. Let be the th such number. What is the remainder when is divided by ?

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