JEE MATHEMATICS MCQ: MATRICES

1 Easy

1 of 1

Application +4 | -1

A = \left[ {\begin{array}{cccccccccccccccccccc} 1&0 \\ 1&1 \end{array}} \right]

and

I = \left[ {\begin{array}{cccccccccccccccccccc} 1&0 \\ 0&1 \end{array}} \right],

then which one of the following holds for all

n \geqslant 1,

by the principle of mathematical induction

View answer and explanation

Correct option: D

{A^n} = nA - (n - 1)I

Option D (

{A^n} = nA - (n - 1)I

) is correct because it holds true for n=1, n=2, and n=3, satisfying the principle of mathematical induction.

More Questions from MATRICES

Practice All Chapter MCQs →

\left|\begin{array}{ccc}a & b-c & b+c \\ c+a & b & c-a \\ a-b & a+b & c\end{array}\right|=0

a, b, c

a x+b y+c=0

{x_2} - {x_3} = 1,\; - {x_1} + 2{x_3} = - 2,\;{x_1} - 2,\;{x_1} - 2{x_2} = 3

2x + 3y + 1 = 0,3x + y - 2 = 0

ax + 2y - b = 0

\left|\begin{array}{ccc}1 & \left(\alpha^{2 x}-\alpha^{-2 x}\right)^2 & \left(\alpha^{2 x}+\alpha^{-2 x}\right)^2 \\ 1 & \left(\beta^{2 x}-\beta^{-2 x}\right)^2 & \left(\beta^{2 x}+\beta^{-2 x}\right)^2 \\ 1 & \left(\gamma^{2 x}-\gamma^{-2 x}\right)^2 & \left(\gamma^{2 x}+\gamma^{-2 x}\right)^2\end{array}\right|

\omega

\left| {\begin{array}{cccccccccccccccccccc} 1&\omega &{{\omega ^2}}\\ \omega &{{\omega ^2}}&1\\ {{\omega ^2}}&1&\omega \end{array}} \right|

A

2 \times 2

A(\operatorname{adj} A)=\left[\begin{array}{cc}10 & 0 \\ 0 & 10\end{array}\right]

|A|