AP EAMCET2013MathematicsBasics of Mathematics
1 2 3 + 1 4 5 + 1 6 7 + 1 8 9 + is equal to
Options
- A( 2 e )
- B( e 2 )
- C(2 e)
- De-1
Correct answer
B. ( e 2 )
Step-by-step solution
aligned & 1 2 3 + 1 4 5 + 1 6 7 + 1 8 9 + & = ( 1 2 - 1 3 )+ ( 1 4 - 1 5 )+ ( 1 6 - 1 7 )+ ( 1 8 - 1 9 )+ & =1- _e 2 & = _e e- _e 2 & = ( e 2 ) aligned