Find each of the following products :
(i) 35×−78 (ii) −92×54 (iii) −611×−53
(iv) −23×67 (v) −125×10−3 (vi) 25−9×3−10
(vii) 5−18×−920 (viii) −1315×−2526 (ix) 16−21×145
(x) −76×24 (xi) 724×(−48) (xii) −135×(−10)
Prove that:
(i) 13+√7+1√7+√5+1√5+√3+1√3+1=1
(ii) 11+√2+1√2+√3+1√3+√4+1√4+√5+1√5+√6+1√6+√7+1√7+√8+1√8+√9=2
Marks | 0−4 | 5−9 | 10−14 | 15−19 | 20−24 | 25−29 | 30−34 | 35−39 |
Frquency | 2 | 5 | 7 | 13 | 21 | 16 | 8 | 3 |