Найти f'\(x\), если f\(x\)= \(5x\cdot(1-\frac{x}{5})\)

• f'\(x\)= \(5-2x\)
• f'\(x\)= \(5x-x^2\)
• f'\(x\)= \(-2x-5\)
• f'\(x\)= \(x^2-5\)