Theorem: Section2sheet5.tendsTo_neg (FormalisingMathematics2024/Section02reals/Sheet5.lean)

State before:
a : ℕ → ℝ
t : ℝ
ha : TendsTo a t
⊢ TendsTo (fun n => -a n) (-t)
Tactic:
sorry
State after:
no goals