Question

If a_n = a+(n-1)d , then a_n-2 is equal to

a) a+(n-2)d
b) a+nd
c) 2a+(n-4)d
d) a+(n-3)d​

Answer 1

Answer:

option (d) a+(n-3)d

Step-by-step explanation:

an = a+(n-1)d

a(n-2) = a+((n-2)-1)d

= a+(n-3)d

Answer 2

Step-by-step explanation:

there is no way to success