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maths and physical sciences quiz
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ADITYA [Class 5]Thursday, March 25, 2010 1:01:28 AM
@manali

1.a^2 + (p + 1/p)a + 1
=a^2 + ap + a/p + 1
=a(a+p) + (a+p)/p
=(a+p)(a+1/p)

2. 64(a+b)^3 + 125c^3 +60(a+b)c(4a+4b+5c)
=(4a+4b)^3 + (5c)^3 +
3.(4a+4b).5c.(4a+4b+5c)
=(4a+4b+5c)^3
[just apply the (a+b)^3 formula]
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MANALI [Class 5]Thursday, March 25, 2010 6:34:17 AM
Aditya, ur answers r right..
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MANALI [Class 5]Thursday, April 1, 2010 9:27:45 AM
COME ON GUYS!! PLEASE COME UP WITH MORE INTERESTING QUESTIONS!!!
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KINGSHUK [Class 12]Thursday, April 1, 2010 10:00:28 AM
find the answer to the following:

(x-a)(x-b)(x-c).........(x-z)
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ANGSHUMAN [Class 5]Monday, April 12, 2010 12:43:00 AM
@ kingshuk, 0
its easy, just look,
expression =
(x-a)(x-b)...(x-x)...
=(x-a)(x-b)...(0)...
=0
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ANGSHUMAN [Class 5]Monday, April 12, 2010 12:50:02 AM
Well ill try to explain as well as i can. heres the deal.
theres a rectangle 7 cm * 14 cm
at every vertex a circle with radius 7 cm is drawn.
find the area of the portion which is not covered by any of the circles inside the rectangle
a figure is available at the link below. u have to find the area of the red region.
http://cid-36414d2d7482a2b4.skydrive.live.com/self.
aspx/Angshu^4s%20only%20album/sum1.jpg
Note: It can be done with help of formulas available to Class 9
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ANGSHUMAN [Class 5]Tuesday, April 13, 2010 1:04:37 AM
another one
find the value of
2^n-2^(n-1)-2^(n-2).....2^0
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