6-x-2-81-4-x-4-x-3-x-2-81-2-x-2-

Question Number 121444 by liberty last updated on 08/Nov/20

6^{x^{2}} + 81 . 4^{x} ⩽ 4^{x} . 3^{x^{2}} + 81 . 2^{x^{2}}

Commented by MJS_new last updated on 08/Nov/20

transform and factorise

(2^{x^{2}} - 4^{x}) (3^{x^{2}} - 81) ⩽ 0

(2^{x^{2}} - 4^{x}) (3^{x^{2}} - 81) = 0

\Rightarrow x = - 2 \lor x = 0 \lor x = 2 where x = 2 is a double zero

\Rightarrow

solution is

- 2 ⩽ x ⩽ 0 \lor x = 2

Commented by liberty last updated on 08/Nov/20

greatt

Commented by harckinwunmy last updated on 08/Nov/20

ff