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Prove by induction that the nth triangle number is given by n(n+1)/2

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...

CB
Answered by Christopher B. Maths tutor
3700 Views

Why is a benzene ring so stable (3 marks)?

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...

AC
Answered by Aadil C. Chemistry tutor
3184 Views

How would I go about drawing the graph of f(x) = sin(x)/(e^x) for -π≤x≤2π?

Drawing this graph uses the same techniques as with most other functions. Just from inspection, we can see that as x increases, e^x also increases, and so the amplitude of the function will decrease (and ...

JZ
Answered by Jonah Z. Maths tutor
5596 Views

'In the years 1529-1556, Charles V's commitments as Holy Roman Emperor badly weakened Spain' Assess the validity of this view. (25 marks)

Introduction:Start off by briefly introducing the topic. Acknowledge the size of Charles' empire by 1529, covering Castile and Aragon, Italy, Mediterranean islands, parts of North Africa and the Americas,...

SH
Answered by Sarah H. History tutor
3310 Views

‘Henry’s treatment of his sons was a more important cause of the Great Rebellion than his baronial policy.’

The most important thing to consider in answering this question is to ensure you are presenting a clear well structured argument. That means you need a point of view of what CAUSED the great rebellion tha...

EA
Answered by Elspeth A. History tutor
3039 Views

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