OH right! I should have realised that!
S6 = 7,812 = a1 * (5^6 - 1)
----------- were a1 = first term
5 - 1
3906*a1 = 7812
a1 = 7812 / 3906 = 2
Therfore the second term = 2*5 = 10 Answer
Answer:
420
Step-by-step explanation:
maybe I don't know sorry
Answer: what is the whole question angel?
Step-by-step explanation:
Answer:
its 7/9
Step-by-step explanation: