Question

which term of gp is5, 10,20,40,.....is 640​

Answer 1

Answer:

hey

Step-by-step explanation:

Explain the formation of following ionic compounds with the help of electron dot structure.

a) Sodium chloride

b) Aluminium chloride7272953463729999

Answer 2

Answer: 8

Step-by-step explanation:

The first term is 5 .

Then the 2nd term would be 2*5

3rd term would be 2*2*5

So nth term would 2^(n - 1)*5

We have to find the value of n , so :-

=> $\frac{2^n}{2} * 5 = 640$

=> $2^n = \frac{640*2}{5}$

=> $2^n = 256$

=> n = ㏒ base2(256)

=> n = 8 .

Hence the 8th term in the series is 640 .

Hence for any given final value of this series , we can find the term .