please solve it it's urgent
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option 4 is the correct answer
ashutoshlaller:
please explain
p=a+b+c=(3i-j)+(i-2j)+(-i+7j)=3i+4j
now in term of a and b
p=2a-3b=2(3i-j)-3(i-2j)=3i+4j
that's it
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