Solve junior high school math problems - Training Enrollment Network

Solve junior high school math problems

1. Solution: March turnover: 400× (1+10%) = 4.4 million.

Volume growth rate from March to May: (633.6-440)/440=0.44=44%.

2. solution: ∫x? -4x+4.5

=x？ -4x+4+0.5

=(x-2)？ +0.5

∫(x-2)？ ≥0

∴(x-2)？ +0.5>0

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