1,034 prompts matching "Showing a set is not closed by a single counter-example"
Showing only prompts that state their year. 35 more in this subject don't name one, so choose All years to see them.
Give me an exam formula sheet for solving quadratics by factorisation
I am in SS 3. Build me a short formula sheet covering every formula I need for solving qua
Give me a past-paper style question bank for solving quadratics by factorisation
I am in SS 3. Give me a bank of four exam-style questions on solving quadratic equations b
Spot my mistake: dividing a polynomial by long division
I am in SS 3. I will show you my full long division working for dividing a polynomial by a
Spot My Mistake: Why matrix subtraction is not commutative
Act as my SS3 Further Mathematics tutor. Work a question on why matrix subtraction is not
Explain Back: Showing that AB and BA are usually different for 2 by 2 matrices
I have just studied showing that AB and BA are usually different for 2 by 2 matrices in my
Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
Act as my SS3 Further Mathematics tutor. Give me five practice questions on why a 2 by 2 m
Explain Back: Showing that a system of concurrent forces is in equilibrium
I have just studied showing that a system of concurrent forces is in equilibrium in my SS3
Spot My Mistake: The moment of a force whose line of action is not perpendicular
Act as my SS3 Further Mathematics tutor. Work a question on the moment of a force whose li
Quiz: The point about which the total moment of a set of forces vanishes
Act as my SS3 Further Mathematics tutor and quiz me on the point about which the total mom
Explain Back: Testing whether data are Poisson by comparing mean and variance
I have just studied testing whether data are Poisson by comparing mean and variance in my
Explain Back: Raising a complex number to a power by de Moivre's theorem
I have just studied raising a complex number to a power by de Moivre's theorem in my SS3 F
Why is matrix multiplication not commutative
Explain in simple terms why AB is not usually equal to BA for matrices, using a worked 2x2
Final Revision: Solving a disguised quadratic by substitution
Act as my WAEC Further Mathematics coach in the last week before the paper. I am in SS 3.
Final Revision: The region of the plane satisfying a set of linear inequalities
Act as my WAEC Further Mathematics coach in the last week before the paper. I am in SS 3.
Common Mistakes: The coefficient of variation, for comparing two sets
Act as my WAEC Further Mathematics coach. I am in SS 3. Show me the mistake candidates mos
Final Revision: Showing that a given motion is simple harmonic
Act as my WAEC Further Mathematics coach in the last week before the paper. I am in SS 3.
Spot My Mistake: Squaring a 2 by 2 matrix
Act as my SS3 Further Mathematics tutor. Work a question on squaring a 2 by 2 matrix with
Spot My Mistake: Multiplying a 3 by 3 matrix by a 3 by 1 column
Act as my SS3 Further Mathematics tutor. Work a question on multiplying a 3 by 3 matrix by
Spot My Mistake: Orders that make a product possible one way round but not the other
Act as my SS3 Further Mathematics tutor. Work a question on orders that make a product pos
Spot My Mistake: Forming the determinant Dx by replacing the first column
Act as my SS3 Further Mathematics tutor. Work a question on forming the determinant Dx by