Question

calculate the least number of the term of GP 5 + 10 + 20....whose sum is exceed 10 lakh​

Answer 1

Answer:

Step-by-step explanation:

a1 = 5

r= 2

an = a1 * (r)^n-1

5120 = 5 * (2)^n-1

(2)^10 = (2)^n-1

-> n=11

Hence 11th term will be 5120

Answer 2

a1 = 5

r=2

an=a1+(r)^n-1

5120=5*(2)n-1

(2)^10=(2)^n-1

=> n=1

11th term will be 5120

hope it will help u