755 prompts matching "IGCSE Additional Maths Y11: Checking an answer for reasonableness — Show All Wor"
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Practice: Finding n when the sum of an arithmetic progression is given
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Common Mistakes: Proving the sum formula by pairing the terms
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Learn: The formula for the sum of the first n terms of a geometric progression
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Show All Working: The sum to infinity of a geometric progression, and when it exists
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Final Revision: Proving the sum formula for a geometric progression
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Learn: The four inequality symbols, and what each one means
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Show All Working: Writing the solution of an inequality as a set
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Learn: Factorising a quadratic before solving the inequality
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Learn: What the modulus of a number means
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Practice: Solving modulus of x greater than a
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
I have just studied why 2 root 3 and 5 root 3 count as similar surds in my SS1 Further Mat
Final Revision: Surds that cannot be combined at all
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Common Mistakes: Expanding the product of two surd brackets
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Final Revision: Simplifying a fraction whose numerator and denominator are both surds
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Explain Back: Solving an equation where the surd must be isolated first
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Explain Back: Testing the integers for closure under division
I have just studied testing the integers for closure under division in my SS1 Further Math
Common Mistakes: Subtraction as an example of neither law
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Final Revision: Why brackets matter when an operation is not associative
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Final Revision: Why distributivity links two operations rather than one
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