Question

can someone explain this??

b) determine the first value of the arithmetic sequence in
which t70 = 500 and d = -43.

Answer 1

Answer:

Step-by-step explanation:

$a+(n-1)*d=t_{n}\\\\a+(70-1)*(-43)=t_{70}\\\\a+69*(-43)=500\\\\a-2967=500\\\\a=500+2967\\\\a=3467$