Question

for arithmetic progression T18-T8=​

Answer 1

Answer:

t18= a+(n-1) d

t18=a+(18-1)d

t18=a+17d

t8=a+(n-1) d

t8=a+(8-1)d

t8=a+7d

t18-18=a+17d - a-7d

t18-t8=10d

Answer