Step-by-step explanation:
Since AB=I, we have
det(A)det(B)=det(AB)=det(I)=1.
This implies that the determinants det(A) and det(B) are not zero.
Hence A,B are invertible matrices: A−1,B−1 exist.
Now we compute
I=BB−1=BIB−1=B(AB)B−1=BAI=BA.since AB=I
Hence we obtain BA=I.
Since AB=I and BA=I, we conclude that B=A−1.
Answer:
x∈ (-1, ∞)
Step-by-step explanation:
<u>Solution of the inequality:</u>
- −2(3x − 1) < 8 ⇒ Divide both sides by -2, this will change inequality
sign to opposite
- 3x - 1 > -4 ⇒ add 1 to both sides
- 3x > -3 ⇒ divide both sides by 3
- x > -1 ⇒ answer
- x∈ (-1, ∞) ⇒ answer as set
Answer:
Gulf Coast Prairies and Marshes.
Step-by-step explanation:
Wave action, a cause or agent of weathering, erosion, and deposition, is constant along the Texas coastline.
I hope this helps, it’s a bit messy but yeahh
Answer:
5x^4 -7x^3-5x^2+5x+1
Step-by-step explanation:
Hey!
You would just add all the numbers up, and by making sure that you combine all like terms. In this case it is just 1-0 = 1 and so the solution would be the same as your question but with a 1 and you would get rid of the -0.
Hope this helps!
