Question

Find the value of
5+(-5)+5+(-5)+5+........... . if the number of fives are -
148

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the answer is 0

find the right process

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Answer 1

Answer:

-5

Step-by-step explanation:

0+0+5+x=0

5+x=0x=-5

Answer 2

(a) answer:

S =   1 - 2 + 3 - 4 + 5 - 6 + ___ + 179 - 180

+   S =       1 - 2 + 3 -  4 + 5 - 6 + ___ + 179 - 180

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2S =           1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - ___ - 1 - 1 - 1 - 180

2S = -180

S =  

S = -90

(b) answer:

 5 + (– 5) + 5 + (– 5) + 5 ......

=  (5 – 5) + (5 – 5) + 5........

=   0 + 0 + 0 + 0 + 5......

=   5

Number of 5 in [5 + (– 5) + 5 + (– 5) + 5] is five.

AND five is an odd number.

and it's soluction is 5.

 

  5 + (– 5) + 5 + (– 5) + 5 + (- 5) ......

=  (5 – 5) + (5 – 5) + (5 – 5).......

=  0    

Number of 5 in [5 + (– 5) + 5 + (– 5) + 5 + (- 5)] is Six.

AND six is even number.

and it's soluction is 0.

We observed that, when number of five is odd answer = 5

and when it is even answer = 0

question 1.) 148

148 is even number then, answer = 0

question 2.) 191

191 is an odd number then, answer = 5