-
1 . 1 . 1 + 1 . 1 . 1 - 3 . 1 . 1 . 1 + 1 . 1 . 1 3 3 3 4 4 4 3 4 5 5 5 5 1 . 1 + 1 . 1 + 1 . 1 - 
1 . 1 + 1 . 1 + 1 . 1 
3 3 4 4 5 5 3 4 4 5 5 3
is equal to :
-
-
2 3 -
3 4 -
47 60 -
49 60
-
Correct Option: C
| Let | = a, | = b, and | = c | |||
| 3 | 4 | 5 |
∴ Expression
| = | ||
| a² + b² + c² - ab - ac - bc |
| = | = a + b + c | |
| a² + b² + c² - ab - ac - bc |
| ⇒ | + | + | = | = | |||||
| 3 | 4 | 5 | 60 | 60 |
