Barisan pena Rachma Martiana

1. Get rid of stress You probably know those people who have constant smiles on their faces and who never let anything get them down. Whether they are faking it or not, a benefit of staying a positive person is that you can get rid of stress! If you focus on the positive side of life, you will cope better with stress . 2. Improve your health Another reason to stay positive is that you can improve your health! Harvard University conducted a study of 25 year old students and followed them through their lives and found that the optimist was in better health than the pessimist at ages 45 and 60. And that’s a good reason to become optimist! 3. Work smarter Staying positive can also help you work smarter and even not harder. The studies showed that positive people perform better than negative people in work environments, because the positive work environment fostered better performance. While this research was done in a workplace, the same could be assumed for schools

Pilihlah jawaban yang paling tepat ! 1.       Pernyataan di bawah ini yang benar adalah …. a.        9   { bilangan prima }                        b.       256   { bilangan kelipatan 4 }            c.        89     { bilangan prima d.       169 { bilangan kwadrat } 2.       N = {x | 2 ≤ x < 7, x   bilangan prima}. Banyak himpunan bagian N adalah …. a.        64                     c.   16 b.       32                     d.   8 3.       Diketahui P = {a, b, c, d, e}. Banyaknya himpunan bagian dari P yang mempunyai tiga anggota adalah …. a.        2                       c.   9 b.       7                       d.   10 4.       Diantara empat pasangan himpunan di bawah ini yang merupakan pasangan yang ekuivalen adalah …. a.        {Faktor dari 4} dan {a, b, c, d} b.       {Bilangan prima kurang dari 6} dan {a, b, c} c.        {Bilangan cacah kelipatan 3 kurang dari 9} dan {p, q, r} d.       {Faktor dari 10} dan {q, r, s} 5.