Answer:
4 is the answer is it right
<span>We have the sequence that follows the pattern: a n = - 4 n + 13. If we want to calcelate the 14th term in this sequence ( or a 14 ), we have to substitute in this formula: n = 14. Then we will get: a 14 = - 4 * 14 + 13 a 14 = - 56 + 13, and finally: a 14 = - 43. Answer: The 14th term in the sequence is - 43.</span>
Answer: 20,000
Step-by-step explanation:
We can estimate the product of 5 and 4,257 by multiplying 5 by 4,000
5 * 4,000 = 20,000
The product of 5 and 4,257 is about 20,000
The real answer (not an estimate)
21,285
That is around 20,000 so we are correct
10. Determine whether or not, vectors ui(1,-2, 0, 3), u2 = (2, 3,0,-1), u3 = (3,9,-4,-2) e R is a linear combination of the (2,-
vodka [1.7K]
If (2, -1, 2, 1) is a linear combination of the three given vectors, then there should exist
such that

or equivalently, there should exist a solution to the system

Right away we get
, so the system reduces to

Notice that the first equation is the sum of the latter two. The third equation gives us

so that in the second equation,

which in turn gives

and hence the (2, -1, 2, 1) is a linear combination of the given vectors, with
