Question

If x + = 7, find the value of x2 + 1 / x2 and x4 + 1 /x4

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Answer 1

Answer:

1. 15/14.

2. 29/28.

Step-by-step explanation:

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Answer 2

Answer:

(i)  X2+1/X2= 15/14=  1  1/14

(ii) X4+1/X4=  49/48=  1  1/48

Step-by-step explanation:

(i) X=7

then, X2+1/X2=7*2+1/7*2=  15/14

15/14 Into impr fraction

1  1/14

(ii) X=7

then,  X4+1/X4=7*4+1/7*4=  49/48

49/48 Into impr fraction

49/48

 1  1/48

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