Question

If (x - 1)⁷(x - 3)⁸(x - 5)⁸⁴⁸⁵ ≤ 0 then x ∈
1) [1,5]
2) [1,3]
3) [3,5]
4) (1,5)

{hint : use wavy curve method)

Answer 1

Answer:

We have,

x

1.5

x

=8x

−1

x

0.5

1

=

x

8

x

0.5

x

=8

x

0.5

=8

On squaring both sides, we get

x=64