** x + 5 = 7
x = 2
** x + 5 = 9
x = 4
{2,4}
$1.2 is the sales tax I think. I did 40 x .03
The sequence is infinite because the exponents 2 ,3 ,4 ,... go on infinitely.
That next number in the equence is obtained by multiplying each term by ab.
the sixth term is 2a^(6)b^(5)
