If x= 3+root7/2,then find the value of 4x 2 +1/x 2.
Answers
Answered by
4
4×2(3+√7÷2)+½(3+√7÷2)
=8×3+8√7÷2+3÷2+√7÷4
=24+1.5+4√7+√7÷4
=(96+6+16√7+√7)÷4
=(102+17√7)÷4
=25.5+3.75√7
=35.42
=8×3+8√7÷2+3÷2+√7÷4
=24+1.5+4√7+√7÷4
=(96+6+16√7+√7)÷4
=(102+17√7)÷4
=25.5+3.75√7
=35.42
Answered by
18
Answer:
32
Step-by-step explanation:
=
......... (1)
Now,2x = 2() =3+√7,
=
Now in (1) we put x=3+√7 and =3-√7
=
= {(3+√7 ) +(3-√7 )}² -4
= (6)² -4=36-4 =32
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