Find 26th term in the arithmetic sequence: -15,-35,-55,-75,...
2 answers:
Answer:
Step-by-step explanation:
hello :
-75-(-55) = (-55)-(-35) = (-35)-(-15)=-20
the ratio diff is : d=-20
the nth term is :An=A1+(n-1)d A1 =-15
An=-15+(n-1)(-20) = 15-20n+20
An = -20n+5
26th term when : n=26 A26 = -20(26)+5 = -515
A26= -515
Answer:
-515
Step-by-step explanation:
In this example the first value is −15 and every value afterwards is 20 less.
After substituting these values to above formula, we obtain:
All we have to do is add 25 twenties or 25 x 20 = 500 and -15 - 500 = -515
You might be interested in
It is <span>B</span>. All u have to do is -2a/b which is 2 then plug 2 in and you get (2,1)
Answer:
Step-by-step explanation:
![\displaystyle = \frac{x^2(y-2)}{3y} \\\\Put \ x = 3, \ y = -1\\\\= \frac{(3)^2(-1-2)}{3(-1)}\\\\= \frac{9(-3)}{-3} \\\\= 9 \\\\ \rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%3D%20%5Cfrac%7Bx%5E2%28y-2%29%7D%7B3y%7D%20%5C%5C%5C%5CPut%20%5C%20x%20%3D%203%2C%20%5C%20y%20%3D%20-1%5C%5C%5C%5C%3D%20%5Cfrac%7B%283%29%5E2%28-1-2%29%7D%7B3%28-1%29%7D%5C%5C%5C%5C%3D%20%5Cfrac%7B9%28-3%29%7D%7B-3%7D%20%5C%5C%5C%5C%3D%209%20%5C%5C%5C%5C%20%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3><h3>Peace!</h3>
Other method:
The first box should be correct
30 + c = 40
