MCQ
The equation $2x + 5y = 7$ has a unique solution, if $x, y$ are:
- ARational numbers
- BReal numbers
- ✓Natural numbers
- DPositive real numbers
✓
Answer
Correct option: C.
Natural numbers
The equation $2 x+5 y=7$ has a unique solution, if $x, y$ are natural numbers.
In natural numbers, there exists only one pair $(1,1)$ which satisfies the given equation.
But for rational numbers, real numbers, positive real numbers, there exist many solution pairs to satisfy the equation.
In natural numbers, there exists only one pair $(1,1)$ which satisfies the given equation.
But for rational numbers, real numbers, positive real numbers, there exist many solution pairs to satisfy the equation.
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