Question Number 114709 by mohammad17 last updated on 20/Sep/20

Commented bymohammad17 last updated on 20/Sep/20

help me sir pleas

Answered by 1549442205PVT last updated on 20/Sep/20

Choose a,b,d,e)80,70,60,50  We need find δ such that  ∀x:  ∣x−1∣<δ then ∣(√x)−1∣<8(1)  because ∣(√x)−1∣<8⇔−8<(√x)−1<8  ⇐0≤(√x)<9⇐0≤x<81⇐−1≤x−1<80  ⇐∣x−1∣<80  Hence choose δ≤80 then(1) is satisfied

Commented bymohammad17 last updated on 20/Sep/20

thank you sir can you help me in otber question