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? secure https://www.mathxl.com/Student/PlayerHomework.aspx?homeworkid.48320 MAC1140 PRE CAL ALG ONLINEMARINA POLYAKOVA 592782 Homework: 12.4 Mathematical Induction Score: 0 of 1 pt 12.4.7 Use the Priniciple of Mathemajcal Induction to show that the given statement is true for all natural numbers n What is the first step in an induction proof? O A. Show that the statement is true for nO O B. Show that the statement is true for n k OC. Show that the statement is true for n-1. O D. Show that the statement is true for nsk+1 select your answer and then click Check Answer

Explanation / Answer

1 + 9 + 9^2 + ..... + 9^(n-1) = 1/8 ( 9^n -1 )

the first step of mathematical induction is

to prove

that it works for n =1

hence, option c is correct

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