Question

if a* =a + 1 and *a=a-1,then 1* - *1+ *2 - *2 - *2 +3* - *3+......+ 1000* - *1000 is equal to​

Answer 1

Answer:

2000

Step-by-step explanation:

a*=a+1

*a=a-1

so a*-*a= a+1-(a-1)

=2

so 1* - *1+ *2 - *2 - *2 +3* - *3+......+ 1000* - *1000

= 2+2+2...... upto 1000 times

=2*1000=2000