Answer:

first create a bracket:

then solve the first bracket:

then open the remaining bracket:

carryout the subtraction operation:

The answer is:t=4 You welcome
A1 = 3 and an = an − 1 − 3
a1 = 2 and an = an − 1 + 0.5
Percent means parts out of 100
40%=40/100=4/10=0.4/1=0.4