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sub nilai t
a)
= (-2/o²) i + (-2/o³)j
= 0
b)
= (-2/1²) i + (-2/1³) j
= -2i - 2j
c)
= (-2/2²)i + (-2/2³) j
= -1/2 i - 1/4 j
d)
= (-2/3²) i + (-2/3³) j
= -2/9 i - 2/27 j