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456 x 99.999 + 654 = ? ? = 456 x 100 + 654 ? = 45600 + 654 ? = 46254
If x4 + x - 4 = 47 then find the value of (x + x-1).
If 
= 4 then
In an A.P 41st term is 50, then the sum of 81 terms of that A.P is:
If cos(A - B) =√3/2and cot(A + B) = 1/√3, where A - B and A + B are acute angles, then (2A - 3B) is equal to:
1/3 + 1/15 + 1/35 + 1/63 + 1/99 = ?
If √x + 1/√x = 2 then find the value of 3x2 + 1/3x2.
If x2 = 15x + 1, then find the value of {x3 - (1/x3) }.
If 2x + y = 15 and xy = 18, then the value of (4x² - y²)
