Question

Pls tell me fast I will mark you as brainlist question 4 only any 2 parts pls fast

Answer 1

Step-by-step explanation:

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Answer 2

$\sf4. (i)x = \dfrac{3}{4},y = \dfrac{5}{6},z = \dfrac{ - 7}{8}$

$\implies \sf \: x + (y + z) = (x + y) + z$

L.H.S

$\sf \implies \: \dfrac{3}{4} + (\dfrac{5}{6} + \dfrac{ - 7}{8})$

$\sf \implies \: \dfrac{3}{4} + (\dfrac{5}{6} - \dfrac{ 7}{8})$

$\sf \implies \: \dfrac{3}{4} + (\dfrac{20 - 21}{24} )$

$\sf \implies \: \dfrac{3}{4} + (\dfrac{ - 1}{24} )$

$\sf \implies \: \dfrac{3}{4} - \dfrac{ 1}{24}$

$\sf \implies \: \dfrac{18 - 1}{24}$

$\sf \implies \: \dfrac{17}{24}$

R.H.S

$\sf \implies \: (\dfrac{3}{4} + \dfrac{5}{6}) + \dfrac{ - 7}{8}$

$\sf \implies \: ( \dfrac{18 + 20}{24}) + \dfrac{ - 7}{8}$

$\sf \implies \: \dfrac{38}{24} - \dfrac{ 7}{8}$

$\sf \implies \: \dfrac{38 - 21}{24}$

$\sf \implies \: \dfrac{17}{24}$

$\sf \bf \therefore \: L.H.S = R.H.S$

$\sf \bf Hence \: verified \: \: \dag$

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$\sf4. (iv)x \: = \dfrac{ - 3}{5} ,y = \dfrac{ - 7}{10} ,z = \dfrac{ - 8}{15}$

$\implies \sf \: x + (y + z) = (x + y) + z$

L.H.S

$\implies \: \dfrac{ - 3}{5} + ( \dfrac{ - 7}{10} + \dfrac{ - 8}{15} )$

$\implies \: \dfrac{ - 3}{5} + ( \dfrac{ - 7}{10} - \dfrac{ 8}{15} )$

$\implies \: \dfrac{ - 3}{5} + ( \dfrac{ - 21 - 16}{30} )$

$\implies \: \dfrac{ - 3}{5} + ( \dfrac{ - 37}{30} )$

$\implies \: \dfrac{ - 3}{5} - \dfrac{ 37}{30}$

$\implies \: \dfrac{ - 18 - 37}{30}$

$\implies \: \dfrac{ - 55}{30}$

R.H.S

$\implies \: ( \dfrac{ - 3}{5} + \dfrac{ - 7}{10}) + \dfrac{ - 8}{15}$

$\implies \: ( \dfrac{ - 6 - 7}{10}) - \dfrac{ 8}{15}$

$\implies \: \dfrac{ - 13}{10} - \dfrac{ 8}{15}$

$\implies \: \dfrac{ - 39 - 16}{30}$

$\implies \: \dfrac{ - 55}{30}$

$\sf \bf \therefore \: L.H.S = R.H.S$

$\sf \bf Hence \: verified \: \: \dag$

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