Answer:
3 is the solution one solution
2 is the solution one solution
3 is the solution one solution
Step-by-step explanation:
Unrecursively, that's
A quadratic will have a linear first difference:
So we get
f(1) = 4
f(n+1) = f(n) + 8n + 4
Answer:
bigger number is 18
smaller number is 6
Step-by-step explanation:
let x be the bigger number and y the smaller
the sum of two numbers is the same as four times the smaller
x+y=4y
x=4y-y
x=3y--------i
if twice the larger is decreased by the smaller, the result is 30
2x-y=30----ii
substituting i for x in ii
2(3y)-y=30
6y-y=30
therefore
5y=30
y=30/5
y=6------iii
substituting iii for y in i to solve for x gives
x=3*6
=18
-4(x+8)+25≤-2+1(x-50)
-4x-32+25≤-2+x-50
-4x-x≤-2-50+32-25
-5x≤-45
-x≤-45/5
-x≤-9
x≥9
Answer: x≥9
2x(x+4)-1(x+4)
2x^2+8x-x-4
2x^2+7x-4