Question

Find the sum of page numbers of the two pages.

Comments

f4

Answer 1

因为是 F4 生，所以就要用 Quadratic Equation 来解这道题。

---

---

---

Let the smaller page number of her textbook = x, then the bigger page number of her textbook=x+1

x(x+1)=2450

x²+x=2450

x²+x-2450=0

【解释：到这里，要使用因式分解，这个你得对数字敏感，2450 和 2500 很靠近，2500=50 ✖️50，2450=  2500-50=  50✖️50-50=  50✖️49】

(x-49)(x+50)=0

【解释：因式分解的方法如下：】

x-49=0          x+50=0

x=49                 x=-50 【 not applicable, as x must bigger than 0】

So, x=49, x+1=50

The sum of page numbers of the two pages =49+50=99

Answer 2

Ans of the sum of page numbers of the two pages is 49+50=99 because The product of two pages is 2450. We use √2450 to find 49 is 1st page and we find 2nd we need to +1 form the previous page that's 50. so when we find sum of two page we just need 49+50 we can find the ans HOPE MY SOLUTION USEFUL FOR YOU

Comments

tq so much