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Published byHeather Carson Modified over 9 years ago
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Feed Back from Test
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Sum of Cubed Numbers. Lesson 3 Aims: To introduce the sum of cubes formula. To recap the sum of natural numbers and the sum of squares. To practice applying all three.
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Sum of the cube numbers n ΣnΣnn3n3 Σn3Σn3 1 2 3 4 5 There is a link between the sum of the natural numbers and the sum of the cube numbers. Complete the table below to see if you can spot what it is.
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Sum of the cube numbers
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Sum of natural numbers Sum of squares Sum of cubes All three Good news they are all in the formula book, page 4.
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Using the sum of the cubes formula Example 1 Find:
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Using the sum of the cubes formula
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On w/b
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Past Exam Question 7 mins to try
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1.Do ex 2C page22 2.Revision exercise 2 page 23 3.Moodle h/w – check in one week. Past Exam Question
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