Ответ:
Объяснение:
=3/2+4/3+5/4+6/5=1 1/2+1 1/3+1 1/4+1 1/5=1 30/60+1 20/60+1 15/60+1 12/60=4 77/60=5 17/60
[tex]5 \frac{17}{60} [/tex]
[tex] \frac{1}{4} \times 6 + \frac{1}{6} \times 8 + \frac{1}{8} \times 10 + \frac{1}{10} \times 12 = \frac{3}{2} + \frac{4}{3} + \frac{5}{4} + \frac{6}{5} = \frac{3 \times 2 \times 5 \times 3}{2 \times 2 \times 3 \times 5} + \frac{4 \times 4 \times 5}{5 \times 4 \times 3} + \frac{5 \times 3 \times 5}{4 \times 3 \times 5} + \frac{6 \times 4 \times 3}{5 \times 4 \times 3} = \frac{90}{60} + \frac{80}{60} + \frac{75}{60} + \frac{72}{60} = \frac{90 + 80 + 75 + 72}{60} = \frac{317}{60} = 5 \frac{17}{60} [/tex]
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Answers & Comments
Ответ:
Объяснение:
=3/2+4/3+5/4+6/5=1 1/2+1 1/3+1 1/4+1 1/5=1 30/60+1 20/60+1 15/60+1 12/60=4 77/60=5 17/60
Ответ:
[tex]5 \frac{17}{60} [/tex]
Объяснение:
[tex] \frac{1}{4} \times 6 + \frac{1}{6} \times 8 + \frac{1}{8} \times 10 + \frac{1}{10} \times 12 = \frac{3}{2} + \frac{4}{3} + \frac{5}{4} + \frac{6}{5} = \frac{3 \times 2 \times 5 \times 3}{2 \times 2 \times 3 \times 5} + \frac{4 \times 4 \times 5}{5 \times 4 \times 3} + \frac{5 \times 3 \times 5}{4 \times 3 \times 5} + \frac{6 \times 4 \times 3}{5 \times 4 \times 3} = \frac{90}{60} + \frac{80}{60} + \frac{75}{60} + \frac{72}{60} = \frac{90 + 80 + 75 + 72}{60} = \frac{317}{60} = 5 \frac{17}{60} [/tex]