Q15...please tell ......
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working of question 15
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SarthakSyal:
answer of question 14 is 4√6-10
i think
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(X+1/X)2=(X)2+(1/X)2+2X+1/X
(3)2=X2+1/X2+2
9=X2+1/X2+2
X2+1/X2=9-2=7
(X2+1/X2)2=(X2+1/X2)2+2X2+1/X2
(7)2=X4+1/X4+2
49=X4+1/X4+2
X4+1/X4=49-2=47
(3)2=X2+1/X2+2
9=X2+1/X2+2
X2+1/X2=9-2=7
(X2+1/X2)2=(X2+1/X2)2+2X2+1/X2
(7)2=X4+1/X4+2
49=X4+1/X4+2
X4+1/X4=49-2=47
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