If a = 1/a-5, then the value of a + 1/a = ?
A) √29 B) √-29 C) - √29 D) √27
Answers
Answered by
0
Answer:
√29
Step-by-step explanation:
a = (1/a) - 5 => a - 1/a = - 5
using identity: (a+b) = √[(a-b)^2 + 4ab]
a + 1/a = √[(a - 1/a)^2 + 4(a) (1/a) ]
= √[(-5)^2 + 4] = √29
option (A) is correct
Similar questions