Math Problem Statement
this is part of a proof. Explain the second last and last line of working
Solution
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Math Problem Analysis
Mathematical Concepts
Mathematical Induction
Arithmetic Sequences
Summation of Sequences
Formulas
Sum of first n terms of arithmetic sequence: S_n = (n/2) [2u_1 + (n-1)d]
General term of an arithmetic sequence: u_k = u_1 + (k-1)d
Theorems
Principle of Mathematical Induction
Suitable Grade Level
Grades 10-12