Problema Solution
the sum of 9 times a number and the reciprocal of the number is positive. find the number which satisfies this condition
Answer provided by our tutors
let 'x' represent the number
9x + (1/x) > 0
click here to see the graph of the function y = 9x + 1/x
we notice that for every x>0 the condition is satisfied that is 9x + (1/x) > 0.