plz give answer with solution
Attachments:
Answers
Answered by
0
Answer:
1). 3/8
2). 19a
3). 25/4
4). 4
5). 126
6). 5y
Step-by-step explanation:
1). if a = -2
7/a - 2 + 17/a² + 4
= 7/(-2)-2 + 17/(-2)² + 4
= 7/-4 + 17/2² + 4
= 7/-4 + 17/4 + 4
= 7/-4 + 17/8
= -7/4 + 17/8
= 3/8
2). 15a - (-4a)
= 15a + 4a
= 19a
3). if x = 2
(x + 1/2)²
= (2 + 1/2)²
= (5/2)²
= 5²/2²
= 25/4
4). (x + 1/x)² - (x - 1/x)²
= 4
5). if a = 3, b = 4, c = 2
= 2 x (3)² + 4 x (3 x 4) + 15 x (2)²
= 2 x 9 + 4 x 12 + 15 x 4
= 18 + 48 + 60
= 66 + 60
= 126
6). (2x + 3y - z) + (-2x + 2y + z)
= 2x + 3y - z - 2x + 2y + z
= (2x -2x) + (3y + 2y) + (-z + z)
= 5y
Answered by
0
Answer:
A=
⎣
⎢
⎢
⎡
0
1
−2
−1
0
−3
2
3
0
⎦
⎥
⎥
⎤
⇒A
′
=
⎣
⎢
⎢
⎡
0
−1
2
1
0
3
−2
−3
0
⎦
⎥
⎥
⎤
⇒2A
′
=
⎣
⎢
⎢
⎡
0
−2
4
2
0
6
−4
−6
0
⎦
⎥
⎥
⎤
⇒A+2A
′
=
⎣
⎢
⎢
⎡
0
−1
2
1
0
3
−2
−3
0
⎦
⎥
⎥
⎤
Similar questions