Question

помогите срочно надо
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Answer 1

a) x²-25≠0 → x²≠25 → x≠±5.

D(y) = ( -∞; -5 ) ∪ ( -5; 5 ) ∪ ( 5; +∞ ).

б) x≠0.

D(y) = ( -∞; 0 ) ∪ ( 0; +∞ ).

в) D(y) = ( -∞; +∞ ).