pleade answer these questions.. here
Answers
I have not solved the first question....as it is not taught to us yet
Given : Number 38 & 39 , Number 99 and 100
To Find : How many non perfect square numbers are there netween the squares of given numbers.
Solution:
all numbers between
38² and 39² are non perfect square
number are
39² - 38² - 1
= 76
Simple rule non perfect square numbers between
n² & (n+1)² are 2n
non perfect square numbers between 99² and 100²
= 2 * 99 = 198
69 x 71
= (70 - 1)(70 + 1)
(a - b)(a + b) = a² - b²
= 70² - 1²
= 4900 - 1
= 4899
Please post question one by one.
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