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base case: (1 x 2)/2 = 1 as required inductive step: assuming statement holds for n=k, the (k+1)th triangle number is given by k(k+1)/2 + (k+1) by definition=(k^2+3k+2)/2=(k+1)(k+2)/2=(k+1)((k+1)+1)/2resu...

To put it simply, we use the conditional tense (le conditionnel) to talk/ speculate about what 'would' happen.It is formed by taking the same stem as the future tense (which in most cases would be the inf...

I agree that Peter is a good example for Christians as he was the first disciple called by Jesus and one of Jesus' closest friends. He followed Jesus "immediately" when asked to follow him and l...

What Mrs Birling says and does throughout:
Her general attitude towards others for example, refusing to help Eva Smith when she needed it the most.The phrases she uses throughout, portray a judgment...

The p orbitals on each carbon atom in benzene overlapThere is delocalisation of electrons in the ring (not 3 localised C==C double bonds)This makes benzene more thermodynamically stable than predictedIt t...