Вправи: 240

240. Порівняйте значення виразів:

1) (–5)²¹ ∙ (–5) = (–5)²² = 5²²; (–5)²⁴ = 5²⁴; 5²² < 5²⁴;

2) (–7)⁸ ∙ (–7)⁷ = (–7 )¹⁵ = – 7¹⁵; (–7)¹⁷ = –7¹⁷; –7¹⁵ > –7¹⁷, бо

7¹⁵ < 7¹⁷;

3) (–8)⁵ ∙ (–8)⁴ = (–8)⁹ = – 8⁹; (–8)⁸ = 8⁸; –8⁹ < 8⁸;

4) (–6)³ ∙ (–6)⁹ = (–6)¹² = 6¹²; (–6)¹³ = –6¹³; 6¹² > –6¹³.