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2. How is a chemical change different from a physical change?
thi​

By Julia

2. How is a chemical change different from a physical change?
thi​

About the author
Julia

UFORTION:
There were total 780 employees in a company. If 40 male employees
joined the company then ratio of the number

Show that the function f: N → N defined by f(n) = n2 is injective.
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