A patient was supposed to take 560 mg of medicine but only tool 420 mg.What percent of the medicine did the patient take?
2 answers:
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Given
x^5*k=a .................(1)
x^2*k=b .................(2)
We need to find x^3.
Solution:
On inspection, we note that (1)/(2) gives x^3 on the left hand side, but the division is valid on conditions that x ≠ 0 and k ≠ 0.
So we conclude:
(1) / (2)
=>
=>
on condition that
and