Question

Giải hộ mình 3 bài tìm nghiệm này với ạhộ mình

Answer 1

a) \(\frac{59-x}{41}+\frac{57-x}{43}+\frac{55-x}{45}+\frac{53-x}{47}+\frac{51-x}{49}=-5\)

\(\Rightarrow\left(1+\frac{59-x}{41}\right)+\left(1+\frac{57-x}{43}\right)+\left(1+\frac{55-x}{45}\right)+\left(1+\frac{53-x}{47}\right)+\left(1+\frac{51-x}{49}\right)=0\)

\(\Rightarrow\frac{100-x}{41}+\frac{100-x}{43}+\frac{100-x}{45}+\frac{100-x}{47}+\frac{100-x}{49}=0\)

\(\Rightarrow\left(100-x\right)\left(\frac{1}{41}+\frac{1}{42}+\frac{1}{45}+\frac{1}{47}+\frac{1}{49}\right)=0\)

Mà \(\frac{1}{41}+\frac{1}{42}+\frac{1}{45}+\frac{1}{47}+\frac{1}{49}\ne0\)

\(\Rightarrow100-x=0\)

\(\Rightarrow x=100\)

Vậy x = 100

Answer 2

a) x=100

b) x ≈ 99.7784191416069

c)x=-100