How to solve this?

I CAN solve it but I need shortcut.

The solution button isn't working in the practise section.

Note by Aryan Gaikwad
4 years, 6 months ago

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1 vote

  Easy Math Editor

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 \( 2 \times 3 \)
2^{34} \( 2^{34} \)
a_{i-1} \( a_{i-1} \)
\frac{2}{3} \( \frac{2}{3} \)
\sqrt{2} \( \sqrt{2} \)
\sum_{i=1}^3 \( \sum_{i=1}^3 \)
\sin \theta \( \sin \theta \)
\boxed{123} \( \boxed{123} \)

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Hey Aryan! Nice question by the way..This question is related to Arithmetic Progression(A.P.)...although i am not sure if you know about them...you can see that every second term has a difference of 14...like the second term is -14 and the fourth term is 0, and similarly, the sixth term is +14...So the numbers at the even place form and A.P. with the first term (a) as -14 and the common difference (d) as +14...Since we are looking at the even places the number of term we need to find is not the 60th but the 30th term. So the number of term we need to find (n) is 30. Therefore, using the formula for finding the n'th term...

n'th term = a + (n-1) d

              = -14 + (30-1) 14



             = -14 + 29 x 14



            = -14 + 406



           = 392 should be your answer

Abhineet Nayyar - 4 years, 6 months ago

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I guess so. First I thought that its just repetition of terms by change of signs. I will try it out and let you know.

Aryan Gaikwad - 4 years, 6 months ago

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