Question

13. If a2 - 5a - 1 = 0 and a = 0; find :
(i) a - 1 / a
(ii) a + 1/ a
(iii) a²- 1 / a²​

Answer 1

Answer:

the answer to three parts is either not defined or infinity

Answer 2

$\huge \fbox \colorbox{orange}{❥Answer࿐ }$

a^2+5a_1=0

a^2_1=5a

a-1/a=5

(a+1/a)^2=(a-1/a)^2+4a×1/a

=5^2+4=29

a+1/a=root over 29

a^2_1/a^2=(a+1/a)(a-1/a)

=root over29×5

=5root over29