F(x) = 3x^2+ 4x^2 – 8x - 2 g(x) = 3x - 5 Find (f - g)(x).
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11. The volume of the triangular pyramid is , then
.
12. They have common base (common triangle). y=7.7, r=23.1, then r:y=23.1:7.7=3.
13. See 10 and 11 for notations in symbols.
SOLUTION
The object would hit the ground at the root of the equation, that is where h = 0
So we have
Solving the quadratic equation, we have
So we ignore -1 as time cannot be negative.
Hence the object hit the ground in 3 seconds