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JEE Class main Answered

plz solve it ..with each step explaining
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Asked by Venu | 11 Oct, 2019, 10:43: AM
answered-by-expert Expert Answer
Given a comma b element of I such that
a(b-1) = 3 + b - b2
rightwards double arrow a b minus a equals 3 plus b minus b squared
rightwards double arrow a b minus a minus b plus b squared equals 3
rightwards double arrow b left parenthesis a plus b right parenthesis minus left parenthesis a plus b right parenthesis equals 3
rightwards double arrow left parenthesis a plus b right parenthesis left parenthesis b minus 1 right parenthesis equals 3
rightwards double arrow b minus 1 equals fraction numerator 3 over denominator a plus b end fraction
rightwards double arrow b equals fraction numerator 3 over denominator a plus b end fraction plus 1
S i n c e comma space b element of I
rightwards double arrow a plus b space c a n space t a k e space e i t h e r space plus-or-minus 3 space o r space plus-or-minus 1
H e n c e comma space o p t i o n s space A space a n d space B space a r e space c o r r e c t.
Answered by Renu Varma | 14 Oct, 2019, 10:22: AM
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