Question

using the online scientific resources
what are prevalences of iron deficiency anemia in developed and developing countries (use primary literature and secondary literature)
give the prevalence and the name of the primary and secondary literature.

Answer 1

Answer:

In mathematics, the additive inverse of a number a is the number that, when added to a, yields zero. This number is also known as the opposite (number), sign change, and negation. ... For example, the additive inverse of 7 is −7, because 7 + (−7) = 0, and the additive inverse of −0.3 is 0.3, because −0.3 + 0.3 = 0.

Answer 2

From which book you ask this question