Question

Consider the first six terms of this sequence: 3,6,12,24,48,96,.......... What would be the sum of the first 19 terms of this sequence? *

393,216
786,429
1,572,861
1,162,261,467​

Answer 1

1,572,861

Explanation:

1. 3

2. 6

3. 12

4. 24

5. 48

6. 96

7. 192

8. 384

9. 768

10. 1536

11. 3072

12. 6144

13. 12288

14. 24576

15. 49152

16. 98304

17. 196608

18. 393216

19. 786432

Now we have to add all those

786432 + 393216 + 196608 + 98304 + 49152+ 24576 + 12288 + 6144 + 3072 + 1536 + 768 + 384 + 192 + 96 + 48 + 24 + 12 + 6 + 3..

This is alot of math but it equals 1572861

1,572,861