tolong no 10 yang bisa mohon batuannya

beda = beda
U2 - U1 = U3 - U2
4x + 1 - 2x = 14 - (4x + 1)
2x + 1 = -4x + 13
6x = 12
x = 2

U1 = 2(2) = 4
U2 = 4(2) + 1 = 9
U3 = 14
b = 9-4 = 5

U10 = a+(10-1)b
U10 = a+9b
U10 = 4+9(5)
U10 = 4+45
U10 = 49