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ax2+bx+c=0 সমীকরণের মূলদ্বয় αβ হলে,

প্রমাণ কর যে, aα+b-2+aβ+b-2=b2-2aca2c2

Created: 1 year ago | Updated: 1 year ago

ax2+bx+c=0   α+β=-ba এবং αβ=ca

এখন, α+β=-ba;aα+b=-aβ

aα+b-2=aβ-2.....(i)

আবার, aβ+b-2+aα-2.....(ii)

L.S=aβ+b-2+aβ+b-2

=1aβ2+1aα2 α2+β2a2αβ2=α+β2-2αβa2αβ2

=-ba2-2caa2ca2=b2-2caa2c2=R.SProved

1 year ago

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AB=3x-4x2x-2xx0-x-xxx2x-2x2x5x-4x3x7x-5x

=x3-42-210-1-11 .x 12-225-437-5=x2100010001 =x2000x2000x2

অনুরূপভাবে, BA=x2000x2000x2 

অতএব, AB = BA

অতএব,  x2I1x2A =B-1 I B-1=B-1=Ax2=3x-4x2x-2x1x0-1x-1x1x 

অতএব, B-1=Ax2

 

 

1 year ago