@Test
	public void derivative_test1() {
		
		try{
		
		double x = 2;
		Power3CFunction pow = new Power3CFunction();
		double result= pow.derivative(x);
		double exp = 12.0;
		Assert.assertEquals(exp, result, 0.001);
		}		
		catch (Exception e) {
			// TODO Auto-generated catch block
			fail("Not yet implemented");
		}
	}