Roboguru

Diketahui space vektor space a with rightwards harpoon with barb upwards on top equals 3 i minus 2 j plus k comma space b with rightwards harpoon with barb upwards on top equals 2 i minus 3 k comma space dan space c with rightwards harpoon with barb upwards on top equals j minus 2 k. space Vektor space yang space mewakili  2 a with rightwards harpoon with barb upwards on top minus 3 b with rightwards harpoon with barb upwards on top plus c with rightwards harpoon with barb upwards on top space adalah space....

  1. 12i-5j+12k

  2. -3j+9k

  3. -7j-9k

  4. -3i-3j+9k

  5. 3i-j+9k

Jawaban:

a with rightwards harpoon with barb upwards on top equals 3 i with rightwards harpoon with barb upwards on top minus 2 j with rightwards harpoon with barb upwards on top plus k with rightwards harpoon with barb upwards on top equals open parentheses table row 3 row cell negative 2 end cell row 1 end table close parentheses  b with rightwards harpoon with barb upwards on top equals 2 i with rightwards harpoon with barb upwards on top minus 3 k with rightwards harpoon with barb upwards on top equals open parentheses table row 2 row 0 row cell negative 3 end cell end table close parentheses  c with rightwards harpoon with barb upwards on top equals j with rightwards harpoon with barb upwards on top minus 2 k with rightwards harpoon with barb upwards on top equals open parentheses table row 0 row 1 row cell negative 2 end cell end table close parentheses  2 a with rightwards harpoon with barb upwards on top minus 3 b with rightwards harpoon with barb upwards on top plus c with rightwards harpoon with barb upwards on top  2 open parentheses table row 3 row cell negative 2 end cell row 1 end table close parentheses minus 3 open parentheses table row 2 row 0 row cell negative 3 end cell end table close parentheses plus open parentheses table row 0 row 1 row cell negative 2 end cell end table close parentheses equals open parentheses table row 6 row cell negative 4 end cell row 2 end table close parentheses minus open parentheses table row 6 row 0 row cell negative 9 end cell end table close parentheses plus open parentheses table row 0 row 1 row cell negative 2 end cell end table close parentheses equals open parentheses table row 0 row cell negative 3 end cell row 9 end table close parentheses equals negative 3 j with rightwards harpoon with barb upwards on top plus 9 k with rightwards harpoon with barb upwards on top

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