1
Question
If A = ⎡⎢⎣248691875⎤⎥⎦ and B = ⎡⎢⎣123456789⎤⎥⎦ then find the third element of the first row of A - B.
- 5
If A = ⎡⎢⎣248691875⎤⎥⎦ and B = ⎡⎢⎣123456789⎤⎥⎦ then find the third element of the first row of A - B.
- 5
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Solution
The correct option is A 5
A = ⎡⎢⎣248691875⎤⎥⎦ and B = ⎡⎢⎣123456789⎤⎥⎦
For A – B, since the orders of A & B are same so it can be obtained by subtracting the corresponding elements of A & B.
⎡⎢⎣248691875⎤⎥⎦ - ⎡⎢⎣123456789⎤⎥⎦ = ⎡⎢⎣(2−1)(4−2)(8−3)(6−4)(9−5)(1−6)(8−7)(7−8)(5−9)⎤⎥⎦
= ⎡⎢⎣12524−51−1−4⎤⎥⎦
So the third element of the first row of this matrix will be 5, which is the correct answer.
A = ⎡⎢⎣248691875⎤⎥⎦ and B = ⎡⎢⎣123456789⎤⎥⎦
For A – B, since the orders of A & B are same so it can be obtained by subtracting the corresponding elements of A & B.
⎡⎢⎣248691875⎤⎥⎦ - ⎡⎢⎣123456789⎤⎥⎦ = ⎡⎢⎣(2−1)(4−2)(8−3)(6−4)(9−5)(1−6)(8−7)(7−8)(5−9)⎤⎥⎦
= ⎡⎢⎣12524−51−1−4⎤⎥⎦
So the third element of the first row of this matrix will be 5, which is the correct answer.
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