if x2+1/x2=11 find the value of x4+1/x4
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Answered by
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the answer is 119. hope it will help you please add me as a brainlist
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bhowmikdham:
i think it should be 123
ok ok ok
no no
incorrect
check your answer
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Answered by
8
Step-by-step explanation:
x^2 + 1/x^2 = 11
=>( x^2 + 1/x^2 )^2 = 11^2
=>x^4 + 1/x^4 + 2 × x^2 × 1/x^2 = 121
=>x^4 + 1/x^4 + 2 = 121
=>x^4 + 1/x^4 = 121 - 2
=> x^4 + 1/x^4 = 119
there fore,
x4+1/x4 = 119
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