Assertion : If a =3 i + k , ~b =- i +2 j + k , c = i + j + k and d =2 i - j , then there…

Mathematics · JEE Advanced · NTA ExamsThree Dimensional Geometry

Assertion : If \(\overrightarrow{\mathrm{a}}=3 \hat{\mathrm{i}}+\hat{\mathrm{k}}, \overrightarrow{\mathrm{~b}}=-\hat{\mathrm{i}}+2 \hat{\mathrm{j}}+\hat{\mathrm{k}}, \overrightarrow{\mathrm{c}}=\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}}\)and \(\overrightarrow{\mathrm{d}}=2 \hat{\mathrm{i}}-\hat{\mathrm{j}}\), then there exist real numbers α, β, γ such that \(\overrightarrow{\mathrm{a}}=\alpha \overrightarrow{\mathrm{b}}+\beta \overrightarrow{\mathrm{c}}+\gamma \overrightarrow{\mathrm{d}}\)
Reason : \(\overrightarrow{\mathrm{a}}, \overrightarrow{\mathrm{~b}}, \overrightarrow{\mathrm{c}}, \overrightarrow{\mathrm{~d}}\) are four vectors in a 3–dimensional space. If \(\overrightarrow{\mathrm{b}}, \overrightarrow{\mathrm{c}}, \overrightarrow{\mathrm{~d}}\) are non–coplanar, then there exist real numbers α, β, γ such that \(\overrightarrow{\mathrm{a}}=\alpha \overrightarrow{\mathrm{b}}+\beta \overrightarrow{\mathrm{c}}+\gamma \overrightarrow{\mathrm{d}}\)
  1. If both assertion and reason are correct and reason is the correct explanation of assertion.
  2. If both assertion and reason are true but and reason is not the correct explanation of assertion.
  3. If assertion is true but reason is false.
  4. If assertion is false but reason is true.
  5. If assertion and reason are both false.

Answer

(B) If both assertion and reason are true but and reason is not the correct explanation of assertion.

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