Arithmetic nth term

Problem Statement

An arithmetic sequence has first term $4$ and common difference $5$. Find $a_{30}$.

Solutions

Use $a_n=a+(n-1)d$:

Further Readings

• HSC Last Resorts: https://vumaths.com/booklets/hsc-last-resorts/
• HSC Complex Numbers: https://vumaths.com/booklets/hsc-complex-numbers/
• HSC Collections: https://vumaths.com/booklets/hsc-collections/
• HSC Integrals: https://vumaths.com/booklets/hsc-integrals/

Connect with me

• YouTube - HSC Maths Extension 1+2: https://www.youtube.com/playlist?list=PLHSE0sAlTr2w
• Website - Vu's Maths Hub: https://vumaths.com/
• GitHub: https://github.com/vuhung16au/