Answer:
aₙ = aₙ₋₁ + n + 1
Step-by-step explanation:
a₁ = 2
a₂ = 2 + 2 + 1 = 5
a₃ = 5 + 3 + 1 = 9
a₄ = 9 + 4 + 1 = 14
a₅ = 14 + 5 + 1 = 20
If you add them all you get 50x12y13
Factors of 36: 1; 2; 3; 4; 6; 9; 12; 18; 36
Factors of 63: 1; 3; 7; 9; 21; 63
Answer: GCF(36; 63) = 9
3x = 4y
X+y = 21
Multiply second equation by 3
3x+3y= 63
Substitute 3x with 4y
4y + y = 21
5y = 21
Y=4.2
X + 4.2 = 21
x= 16.8
