Question Number 10232 by konen last updated on 30/Jan/17

x∈Z, A∈R  A=^4 (√(3−∣x−4∣)) ⇒Σx=?

Answered by mrW1 last updated on 30/Jan/17

A∈R ⇒ 3−∣x−4∣≥0  ∣x−4∣≤3  −3≤x−4≤3  1≤x≤7  since x∈Z ⇒ Σx=Σ_(i=1) ^7 i=((7×8)/2)=28