# math

posted by
**Riana**
.

how would i find the sum of the 7 term. if i have 1st term = 11 and 7th term = 704.its a geometric series.

i don't know how to find the difference?

posted by
**Riana**
.

how would i find the sum of the 7 term. if i have 1st term = 11 and 7th term = 704.its a geometric series.

i don't know how to find the difference?