C expression, we can use the sum function in python. For e, the command.
sum(x**2 for x in range (1,101))
e sum of the squares of the first hundred natural numbers.
1) Find the sum of the first 25 terms of each of the arithmetic sequenc
below.
1) 11, 22, 33, ii) 12, 23, 34, iii) 21, 32, 43,
iv) 19, 28, 37, .. v) 1, 6, 11,​

step-by-step explanation:

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)