# 21 - Matrices and Determinant Questions Answers

Let A = and 10B = if B inverse of matrix A, then k is

1)-2

2)-1

3)2

4)5

**Asked By: ROHAN KOSANDAL**4 year ago

is this question helpfull: 17 15

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**what is the solution of the equation ln(dy/dx) + x = 0 ?**

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**(a) y + e**^{x} = c (b) y - e^{-x} = c (c) y + e^{-x} = c (d) y - e^{x} = c

^{x}= c (b) y - e

^{-x}= c (c) y + e

^{-x}= c (d) y - e

^{x}= c

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 8 5

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**consider the curve X = a(cosɵ + sinɵ ) and Y= a( sinɵ - ɵ cosɵ ).what is d**^{2}y/dx^{2} equal to ?

^{2}y/dx

^{2}equal to ?

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**(a) sec**^{2}ɵ (b) -cosec^{2}ɵ (c) sec^{3}ɵ/aɵ

^{2}ɵ (b) -cosec

^{2}ɵ (c) sec

^{3}ɵ/aɵ

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 6 5

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**Which one of the following is one of the solution of the equation tan2x.tanx = 1?**

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**(a) π /12 (b) π /6 (c) π /4 (d) π /3**

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 10 5

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**In a triangle ABC, c=2, A=45 degree, a = 2root2, then what is C equal to ?**

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**(a) 30 degree (b) 15 degree (c) 45 degree **

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 8 5

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**Question 1:- If A and B are square natrices of second order such that IAI =-1 , IBI = 3 , then what is I3ABI equal to ?**

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**(a) 3 (b) -9 (c) -27 **

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 9 4

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**If A=**** is symmetric matrix, then what is x equal to ?**

**(a) 2 (b) 3 (c) -1 (d) 5 **

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 5 3

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**Queation 1 :- every quadratic equation ax2 + bx + c = 0 where a,b,c belongs to R, a ≠ 0 has **

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**(a) exactly one real root**

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**(b) art least one real root**

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**(c) at least two real roots**

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**(d) at most two real roots.**

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 8 2

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**If a ≠b≠c are all positive, then the value of the determinant a b c is:- **

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** b c a**

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** c a b **

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**(a)non-negative (b) non- positive (c) negative **

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**(d) positive **

**Asked By: SWATI KAPOOR**5 year ago

is this question helpfull: 6 2

**submit your answer**what is hermition and skew harmition matrix?

**Asked By: GARLAPATI ARUN**5 year ago

is this question helpfull: 6 3

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