8/a-9/5

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Solution for 8/a-9/5 equation: 


D( a )

a = 0

a = 0

a = 0

a in (-oo:0) U (0:+oo)

8/a-(9/5) = 0

8/a-9/5 = 0

8*a^-1 = 9/5 // : 8

a^-1 = 9/40

-1 < 0

1/(a^1) = 9/40 // * a^1

1 = 9/40*a^1 // : 9/40

40/9 = a^1

a = 40/9

a = 40/9

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