Question 62
If the sequence 2 , 4 , 2 , 4 , 2 , 4 , ... continues as shown, then the sum of the first 19 terms is _____?
Solution
We can see 2 is in the odd places and 4 in the even places.
In the 1st 18 terms, there are 9 4's and 2's which sum up to 54 and the 19th term being 2 is added to get sum of 1st 19 terms as 56.
Get AI Help
Video Solution
Click on the Email ☝️ to Watch the Video Solution
Create a FREE account and get:
- Download Maths Shortcuts PDF
- Get 300+ previous papers with solutions PDF
- 500+ Online Tests for Free
