3.The general formula for compound interest is given as _____________________
a.p(1+r)
b.P(1+rn)
c.\\(P(1+r)^{n}\\)
d.P+r
4.Let A be any set. If f assign to each element in A the element itself, then f is called
a.identity functions
b.surjective functions
c.injective functions
d.constant function
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