Answered

Maligayang pagdating sa IDNStudy.com, ang iyong platform para sa lahat ng iyong katanungan! Tuklasin ang mga maaasahang impormasyon sa anumang paksa sa pamamagitan ng aming network ng bihasang mga propesyonal.

a natural number decreased by 30 times its reciprocal is 1. find the natural number

Sagot :

Let n be the number
      1/n  = reciprocal of the number
      
Equation:
    n - 30(1/n) = 1
    
    (n) (n) - 30 (n)  = (1)(n)
                  n
      n² - 30 = n
      n² - n - 30 = 0

Solve by factoring:
    (n - 6)  (n + 5) = 0
 
    n-6 = 0                  n+5 = 0
    n = 6                      n = -5

The problem is looking for natural number, so choose the positive solution/rrot which is n= 6

Final Answer:  The natural number is 6.

TO Check:
   n - 30(1/n) = 1
   6 - 30 (1/6) = 1
   6 - (30/6) = 1
    6 - 5 = 1
          1 = 1