Question
If (x
–1.3)3+(x–1.4)3+(x–1.5)3 = 3(x–1.3)(x–1.4)(x–1.5), Then x = ?Solution
if a+b+c = 0 then a3+b3+c3 = 3abc and it is also vice versa. So Here (x-1.3)+(x-1.4)+(x-1.5) =0 so 3x-4.2 = 0 or x = 1.4 ` `
The mean proportion of 324 and 225 is:
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