5a根号下(1600+xˆ2)+3a(50-x)
问题描述:
5a根号下(1600+xˆ2)+3a(50-x)
5a√(1600+xˆ2)+3a(50-x)
答
设y=5a√(1600+x²)+3a(50-x)
y'=5a*(1600+x²)'/2√(1600+x²)+3a(-1)
=5a*(2x)/2√(1600+x²)-3a
=5ax/√(1600+x²)-3a