Question

1
12. If a2 + = 7, find:
a?
1
(i) a + and (ii) a
1
-
a​

Answer 1

Answer:

sol: a + 1/a = 3

Step-by-step explanation:

a² + 1/a² = 7

a² + 1/a² = (9 - 2)

a² + 1/a² + 2 = 9

a² + 1/a² + 2 a * 1/a = 3²

(a + 1/a)² = 3²

HENCE,

a + 1/a = 3