Question

(i) (A2+1/A2
=27, find the value of (i) (a-1/a)
a3
-1/a3​

Answer 1

Answer:

given a^2+1/a^2=11

(a+1/a)^2=13

(a+1/a)=sqrt13

(a-1/a)^2=(a+1/a)^2-4

=13-4=9

(a-1/a)=+or-3

we know that a^3-b^3=(a-b)(a^2+ab+b^2)

a^3-1/a^3=(a-1/a)(a^2+1+1/a^2)

=3(12)

=36

Answer 2

here is ur answer

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