Home
Class 12
MATHS
If A=[5a-b3 2] and A adj A=AA^T , then ...

If `A=[5a-b3 2]` and A adj `A=AA^T` , then `5a+b` is equal to: (1) `-1` (2) 5 (3) 4 (4) 13

A

-1

B

5

C

4

D

13

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ALGEBRA

    CHHAYA PUBLICATION|Exercise JEE ADVANCED ARCHIVE 2013|2 Videos

  • ALGEBRA

    CHHAYA PUBLICATION|Exercise JEE ADVANCED ARCHIVE 2014|2 Videos

  • ALGEBRA

    CHHAYA PUBLICATION|Exercise JEE MAIN (AIEEE) ARCHIVE 2015|2 Videos

  • ADJOINT AND INVERSE OF A MATRIX AND SOLUTION OF LINEAR SIMULTANEOUS EQUATIONS BY MATRIX METHOD

    CHHAYA PUBLICATION|Exercise ASSERTION-REASON TYPE|2 Videos

  • ARCHIVE

    CHHAYA PUBLICATION|Exercise JEE Advanced Archive|13 Videos

Similar Questions

Explore conceptually related problems

If A=[(5a,-b),(3, 2)] and A adj A=A A^T , then 5a+b is equal to: (1) -1 (2) 5 (3) 4 (4) 13

In triangle A B C , if sinAcosB=1/4 and 3t a n A=t a n B ,t h e ncot^2A is equal to (a)2 (b) 3 (c) 4 (d) 5.

In triangle A B C , if r_1=2r_2=3r_3, then a : b is equal to 5/4 (b) 4/5 (c) 7/4 (d) 4/7

If A is an 3xx3 non-singular matrix such that A A^T=A^T A and B""=""A^(-1)A^T , then BB^T equals (1) I""+""B (2) I (3) B^(-1) (4) (B^(-1))^T

Let a_1, a_2, a_3, ?a_10 are in G.P. if a_3/a_1 =25 then a_9/a_5 is equal to (A) 5^4 (B) 4.5^4 (C) 4.5^3 (D) 5^3

If A=[(3,-5),(-4,2)] , then the value of A^(2)-5A is equal to -

If (log)_4 5=aa n d(log)_5 6=b , then (log)_3 2 is equal to 1/(2a+1) (b) 1/(2b+1) (c) 2a b+1 (d) 1/(2a b-1)

If a ,b and c are in A.P. and b-a ,c-b and a are in G.P., then a : b : c is (a). 1:2:3 (b). 1:3:5 (c). 2:3:4 (d). 1:2:4

If A-2B ={:[(1,5),(3,7)]and 2A-3B = {:[(-2,5),(0,7)]:} then matrix B is equal to__

If sin^(-1)(5/x)+sin^(-1)((12)/x)=pi/2, then x is equal to 7/(13) (b) 4/3 (c) 13 (d) (13)/7