Question

Find (a + b ) ÷ (a – b) if


(i)
a = 1/2
b = 2/3





(ii) a = -3/5

b = 2/15

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Answer 1

Answer:

i. 1

ii. 7/11

Step-by-step explanation:

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Answer 2

answer

use term (a+b) ÷(a-b)----- eq(0)

(1)

$when \: a = \frac{1}{2} \: and \: b = \frac{2}{3} \\ eq \: {0} \: = ( \frac{1}{2} + \frac{2}{3} ) \div (\frac{1}{2} - \frac{2}3) \\ = \frac{7}{6 } \div - \frac{1}{6} \\ = \frac{7}{6} \times - 6 \\ = - 7$

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(2)

$when \: a = \frac{ - 3}{5} and \: b = \frac{2}{15} \\ eq(0) \\ \: ( \frac{ - 3}{5} + \frac{2}{15} ) \div (\frac{ - 3}{5} - \frac{2}{15}) \\ \frac{ - 7}{15} \div \frac{ - 11}{15} \\ \frac{ - 7}{15 } \times \frac{ - 15}{11} \\ = \frac{7}{11}$

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