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The modern periodic table is based on the atomic number (number of protons in an atom) rather than atomic weight. This arrangement, proposed by Moseley, resolves anomalies in Mendeleev's periodic table.
If x = 99, then the value of x5 - 100x4 + 100x3 - 100x2 + 100x - 1 is
If x4 + 1/(x4) = 194 , , then find the value of 1/(x3 ) + x3 ?
...If x2 - 3x + 2 is a factor of, x4 - px2 + q, then (p, q) =
If a + b + c = 11, ab + bc + ca = 3 and abc = -135, then what is the value of a³ + b³ + c³ ?
If 3x + (1/3x) = 9 then find 27x³ + (1/27x³ ) = ?
The coefficient of ‘b2’ in (3a + b)3 is
If (a + b)2 = 18 + c2, (b + c)2 = 22 + a2 and (c + a)2 = 24 + b2, then find the va...
A train takes 25 seconds more to cross a 750 metres long platform than it does to cross a 350 metres long bridge. If the time tak...
If 2x + (1/9x) = 5, then find the value of 81x2 + (1/4x2) - (1785/4)
Suppose xy = -15 and (x² + y²) = 34, then determine the value of (x – y).
