Let f : R → R and g : R → R be two (not necessarily continuous) functions. Suppose that
f
−1
((a,∞)) = g
−1
((a,∞)) for all a ∈ Q.
Show that f(x) = g(x) for all x ∈ R

y=mx+

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step-by-step explanation:

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

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