See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
10 questions from this quiz
Second differences are constant
3,5,7,93, 5, 7, 93,5,7,9
2,2,22, 2, 22,2,2
Tn=an2+bn+cT_n = an^2 + bn + cTn=an2+bn+c
aaa is half the second difference
a=1a = 1a=1
b+c=3b + c = 3b+c=3
b=0b = 0b=0, c=3c = 3c=3
Tn=n2+3T_n = n^2 + 3Tn=n2+3
T3=12T_3 = 12T3=12
Select your subjects, and get access to A+ resources today.