Question
If 4x² + y² = 40 and x y = 6, then find the value
of 2x + y?Solution
given - 4x² + y² = 40 and x y = 6 so now (2x+y) ² =4x² +y²+4xy = 40+4×6=64 (2x+y) =8
The mean proportion of 324 and 225 is:
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