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Prove by induction that (n^3)-n is divisible by 3 for all integers n>0 (typical fp1 problem)

Let P(n) be the statement “(n^3)-n is divisible by 3”

First we’ll examine the base case: P(1)

(n^3)-n=1^3-1=1-1=0

0=3*0, so is divisible by 3, and so P(1) is true

Now assume fo...

TN
6964 Views

A football is kicked at 30 m/s at an angle of 20° to the horizontal. It travels towards the goal which is 25 m away. The crossbar of the goal is 2.44 m tall. (A) Does the ball go into the goal, hit the crossbar exactly, or go over the top?

With questions about projectiles, such as a ball travelling in the shape of a parabola through the air as in the above question, it is always good to split the problem into the horizontal and vertical com...

ES
Answered by Ehsaan S. Maths tutor
13936 Views

Explore Shakespeare’s presentation of family in King Lear. You must relate your discussion to relevant contextual factors and ideas from your critical reading.

Shakespeare illustrates that at the beginning of the play, Lear’s views on how family love is expressed and measured is corrupt as his two insincere daughters are rewarded while his most loving and most l...

BS
Answered by Bethan S. English tutor
5147 Views

Differentiate x^cos(x) and find the derivative of cosec^-1(x)

for part a) let y=xcos(X) , the ln(y)=ln(xcos(X))=cos(x)ln(x), thus d/dx (ln(y(x)) = d/dx (cos(x)ln(x)), 1/y*dy/dx=cox(x)/x - sinxlnx => solve for dy/dx =>...

HP
Answered by Hari P. Maths tutor
8038 Views

What is the difference between "mieux", "meilleur(s)" and "meilleure(s)"?

Mieux is the superlative form of the adverb bien, meaning well.
Meilleur is the superlative form of the adjective bon

RF
Answered by Raquel F. French tutor
25426 Views

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