(2, 5), (4, 7)

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If $\frac{4}{7} + \frac{2}{5} + \frac{- 4}{5} + \frac{1}{7} + \frac{- 5}{7} = \frac{- 2}{m}$ . Find $m$ .

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\frac{4}{7} - \frac{5}{7^{2}} + \frac{4}{7^{3}} - \frac{5}{7^{4}} + \frac{4}{7^{5}} - \frac{5}{7^{6}} + . . . .

to infinity.

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Name the octants in which the following points lie:
(i) (5, 2, 3)
(ii) (–5, 4, 3)
(iii) (4, –3, 5)
(iv) 7, 4, –3)
(v) (–5, –4, 7)
(vi) (–5, –3, –2)
(vii) (2, –5, –7)
(viii) (–7, 2 – 5)

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2/3 x [-6/7+4/5]=[ 2/3 x 4/5] x (-6/7)

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Name the property under multiplication used in each of the following:
(i)

\frac{2}{3} \times \frac{4}{5} = \frac{4}{5} \times \frac{2}{3}

(ii)

(\frac{- 3}{4}) \times 1 = \frac{- 3}{4} = 1 \times (\frac{- 3}{4})

(iii)

(\frac{- 17}{28}) \times (\frac{- 28}{17}) = 1

(iv)

\frac{1}{5} \times (\frac{7}{8} \times \frac{4}{3}) = (\frac{1}{5} \times \frac{7}{8}) \times \frac{4}{3}

(v)

\frac{2}{7} \times (\frac{9}{10} + \frac{2}{5}) = \frac{2}{7} \times \frac{9}{10} + \frac{2}{7} \times \frac{2}{5}

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