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D( a )
a = 0
a = 0
a = 0
a in (-oo:0) U (0:+oo)
2.8 = 1350000/a // - 1350000/a
2.8-(1350000/a) = 0
2.8-1350000*a^-1 = 0
-1350000*a^-1 = -2.8 // : -1350000
a^-1 = 0.00000207
-1 < 0
1/(a^1) = 0.00000207 // * a^1
1 = 0.00000207*a^1 // : 0.00000207
483091.78743961 = a^1
a = 483091.78743961
a = 483091.78743961
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