Question

plz Answer q no. 5​

Answer 1

Answer:

Step-by-step explanation:

$(x+y)^{-1}=x^{-1}+y^{-1}\\\\x=\frac{5}{9}\\\\y=-\frac{4}{3}\\\\(\frac{5}{9}-\frac{4}{3})^{-1}\\\\=-\frac{9}{7}\\also\\\\\frac{9}{5}-\frac{3}{4}\\\\=\frac{21}{20}\\\\Therefore\\\\(x+y)^{-1}\neq x^{-1}+y^{-1}$

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