NCERT 2022 | संबंध एवं फलन - L9 | relation and function | Class 12 गणित | Jitendra Sir | 11 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)}

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 ?

Class 12 Maths Chapter 1 Relations And Functions Important Questions | CBSE Board Quick Revision

Study the following information and answer the questions given below it : The admission ticket for an exhibition bears a password which is changed after every clock hour based on set of words chosen for each day. The following is an illustration of the code and steps of rearrangement for subsequent clock hours. The time is 9 am to 3 pm Batch I (9 am to 10 am) : is not ready cloth simple harmony burning Batch II (10 am to 11 am) : ready not is cloth burning harmony simple Batch III ( 11 am to 12 noon) : cloth is not ready simple harmony burning Batch IV (12 noon to 1 pm) : not is cloth ready burning harmony simple Batch V (1 pm to 2 pm) : ready cloth is not simple harmony burning and so on. If the password for 11 am to 12 noon was --- 'soap shy miss pen yet the she', what was the password for Batch I ?

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.

If matrix A=[[1,2,3], [4,1,2], [1,-1,2]] B= [[2,1,3], [4,1,-1], [2,2,3]] C= [[14], [12], [2]] D= [[13], [11], [14]]. When X= [[x], [y],[z]] is such that solutions of equations AX=C and BX=D represents two points L and M in three dimensional space. If l' and M' are the reflection of points L and M in the plane x+y+z=9 then find values of L,M,L' and M'

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?

C 3 F 6 : I9L12 : : K 11 N 14 : ?