Question

4th term of a g. p is 40 and 10th term is 2560.find the 7th term

Answer 1

hey

here is ur answer

Answer 2

Answer:

4th term = 40

ar^3=40----------1

tenth term= 2560

ar^9=2560--------------------2

2/1 gives r^6=64

               r=6root of64

              r=2

ar^3=40

a*2^3=40

a=40/8

a=5

therefore seventh term =ar^6

                                        =5*2^6

                                        =5*64

                                        =320