Roboguru

Diberikan vektor-vektor  dan . Hitunglah: b.

Diberikan vektor-vektor begin mathsize 14px style straight a with rightwards harpoon with barb upwards on top equals 3 straight i with rightwards harpoon with barb upwards on top minus straight j with rightwards harpoon with barb upwards on top end style dan begin mathsize 14px style straight b with rightwards harpoon with barb upwards on top equals negative 8 straight i with rightwards harpoon with barb upwards on top plus 5 straight j with rightwards harpoon with barb upwards on top end style. Hitunglah:

b. begin mathsize 14px style straight a with rightwards harpoon with barb upwards on top minus straight b with rightwards arrow on top end style

Jawaban:

Perhatikan perhitungan berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight a with rightwards harpoon with barb upwards on top minus straight b with rightwards harpoon with barb upwards on top end cell equals cell left parenthesis 3 straight i with rightwards harpoon with barb upwards on top minus straight j with rightwards harpoon with barb upwards on top right parenthesis minus left parenthesis negative 8 straight i with rightwards harpoon with barb upwards on top plus 5 straight j with rightwards harpoon with barb upwards on top right parenthesis end cell row blank equals cell 3 straight i with rightwards harpoon with barb upwards on top minus straight j with rightwards harpoon with barb upwards on top plus 8 straight i with rightwards harpoon with barb upwards on top minus 5 straight j with rightwards harpoon with barb upwards on top end cell row blank equals cell 11 straight j with rightwards harpoon with barb upwards on top minus 6 straight j with rightwards harpoon with barb upwards on top end cell end table end style

Jadi, bentuk begin mathsize 14px style straight a with rightwards harpoon with barb upwards on top minus straight b with rightwards arrow on top end style adalah begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank 11 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell straight j with rightwards harpoon with barb upwards on top end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell straight j with rightwards harpoon with barb upwards on top end cell end table end style.

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