Va rog sa ma ajutati cu exercițiul 7
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Find the missing factor in exponential form 48^2=3^2 • ?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

If a is a nonzero real number then the reciprocal of a is