NCERT 2022 | संबंध एवं फलन - L9 | relation and function | Class 11 गणित | Jitendra Sir | 10 AM |

Class 12 Maths | Chapter 1 | संबंध एवं फलन | Important Questions | Quick Revision

Which of the following relations are functions ? Give reasons . In case of a functions find its domain and range . (i) f = {(-1,2) , (1,8) (2,11) , (3,14)} (ii) g = { (1,1) , (1,-1) , (4,2) , (9,3) , (16,4)} (iii) h={(a,b) , (b,c) , (c, d),(d,c)}

Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectively. The first pipe was opened at 8 am second at 9 am third at 10 am and fourth at 11 am. When will the reservoir be full? 1 pdotmdot b. 2 pdotmdot c. 2. 30 pdotmdot d. 3 pdotmdot

There are twelve friends A, B, C, D, E, F, G, H, I, J, K and L who invested money in some business in the ratio of 1 : 2 : 3 : 4: 5 : 6 : 7 : 8 : 9 : 10 : 11 : 12 and the duration for which they invested the money is in the ratio of 12 : 11 : 10 : 9 : 8 : 7 : 6 : 5 : 4 : 3 : 2 : 1 respectively. Who will get the maximum profit at the end of the year ?

If A={1,2,3,4},B={1,5,9,11,15,16} and f={(1,5),(2,9),(3,1),(4,5),(2,11)} are the following statements true ? (i) f is a relation from A to B . (ii) f is a function from A to B Justify your answer.