हिंदी

Bccbccaabaab|b+ccbcc+aabaa+b| = ______. -

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प्रश्न

`|("b" + "c", "c", "b"),("c", "c" + "a", "a"),("b", "a", "a" + "b")|` = ______.

विकल्प

  • a + b + c

  • 2a + b + c

  • ab + bc + ca

  • 4abc

MCQ
रिक्त स्थान भरें

उत्तर

`|("b" + "c", "c", "b"),("c", "c" + "a", "a"),("b", "a", "a" + "b")|` = 4abc.

Explanation:

`|("b" + "c", "c", "b"),("c", "c" + "a", "a"),("b", "a", "a" + "b")|`

Applying C1→C1 + C2 + C3

`|(2("b" + "c"), "c", "b"),(2("c" + "a"), "c" + "a", "a"),(2("a" + "b"), "a", "a" + "b")|`

Applying C1→C1 – C2

`2|("b", "c", "b"),(0, "c" + "a", "a"),("b", "a", "a" + "b")|` = `2"b"  |(1, "c", "b"),(0, "c" + "a", "a"),(1, "a", "a" + "b")|`

= `2"b"|(0, "c" - "a", -"a"),(0, "c" + "a", "a"),(1, "a", "a" + "b")|` Applying R1→R1 – R3

= 2b{a(c – a) + a(c + a)}

= 2b{ac – a2 + ac + a2}

= 4abc

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