in Calculus recategorized by
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For the parallelogram OPQR shown in the sketch, $\overrightarrow{OP}=a \hat{i}+b \hat{j}$ and $\overrightarrow{OR}=c \hat{i} +d \hat{j}$. The area of the parallelogram is

  1. $ad-bc$
  2. $ac+bd$
  3. $ad+bc$
  4. $ab-cd$
in Calculus recategorized by
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