Question

find the 10th and 20th terms of the GP with first term 3 and common ratio 2

Answer 1

Answer:

given

1 st term a1=a=3

command ratio=2

10 th term=ar^9=3×2^9=3×512=1536

20 th term =ar^19=3×2^19=524288×3=1572 864

Answer 2

g.p=a'n=ar^n-1

a'10=3(2)^10-1=1536
a'20=3(2)^20-10=1572864