Question

19) The Sum to infinity of the following geometric
Progressions 10,9,8.1,7.29....is
a) 100
b) 15
c) 51
d) 654​

Answer 1

Answer:

are koff to unko hoga jo marne se darte hai..

hm to vo badsaah hain..

jiske aage samsaan v slami bharte hain...

Answer 2

We observe that the above progression possess a common ratio. So it is a geometric progression.

Common ratio = r = -9/10

Sum of infinite GP = a/1-r

,where a is the first term and r is the common ratio.

Note: We can only use the above formula if |r|<1

Clearly, a = 10 and r = -9/10

⇒ sum =

$\frac{10}{1 + \frac{9}{10} }$

= 100/19