2/a-7/9

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Solution for 2/a-7/9 equation: 


D( a )

a = 0

a = 0

a = 0

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

2/a-(7/9) = 0

2/a-7/9 = 0

2*a^-1 = 7/9 // : 2

a^-1 = 7/18

-1 < 0

1/(a^1) = 7/18 // * a^1

1 = 7/18*a^1 // : 7/18

18/7 = a^1

a = 18/7

a = 18/7

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