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.
- When constructing inscribed polygons and parallel lines<span>, the </span>steps<span> are </span>different<span> as a compass is used to copy an angle. A compass is an .</span>
Answer:
$246
Step-by-step explanation:
6 x 9 + 12 x 16= 246
Answer:
Step-by-step explanation:
when finding the slope, change in the x value is considered the RUN
slope = (y2 - y1) / (x2 - x1) = rise / run