S4=a1(q^4-1)/q-1=-3*(-3^4-1)/-4=-3*(81-1)/4=-3*80/-4=60.
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
S4=a1(q^4-1)/q-1=-3*(-3^4-1)/-4=-3*(81-1)/4=-3*80/-4=60.