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junior college 2 | H2 Maths
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i need solution step by step pls
1. We need to prove that the base case (often n = 1) is true.
2. We are going to assume that the kth statement is true for some value of k (sorry, I wrote wrongly on my paper)
3. We are going to prove that the (k + 1)th case is true by doing a series of simplifications. We cannot just write the (k + 1)th statement immediately and say that it’s proven. Rather, we need to work out way out.
4. The third step above establishes that any two pairs of consecutive cases k and k + 1 will hold for any choice of k. Combined with the first step, this means that
- since the first statement (k = 1) is true, the second statement (k + 1 = 1 + 1 = 2) is true
- since the second statement (k = 2) is true, the third statement (k + 1 = 2 + 1 = 3) is true
- since the third statement (k = 3) is true, the fourth statement (k + 1 = 3 + 1 = 4) is true.
- and so on, infinitely.
So, this means that every single choice of k works.
As such, our equation has been proven by the method of induction.
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