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3 / 2 log3 is the logarithm of base 0.6, log2 is the third power of base radical 24, log4 is the logarithm of base 5, and log5 is the logarithm of base 4
3 / 2 log3 is the logarithm of bottom 0.6 (3 / 2) log2 16 = (3 / 2) * 4 = 6
Log4 is the logarithm of base 5 > log4 = 1 log4 5
Derivative of trigonometric function Find the derivative of y = (sin2x) ^ 2. Find the solution in a similar form,
This is a complex function derivative
Answer: 4sin2xcos2x
2sin2x*cos2x*2
First, sin2x is regarded as t, so y = T ^ 2 takes its derivative as 2T;
Then we take 2x as X, so we have t = SiNx to take its derivative, t '= cosx;
Then x = 2x, derivative x, X '= 2;
So 2T * cosx * 2 = 2sin2x * cos2x * 2
In addition to the starting point and destination, the express train from Beijing to Shanghai also stops at five stations on the way. How many tickets can this train have?
There should be soft seats, hard seats, soft bedrooms and hard bedrooms. Maybe there are no soft seats
There are 15 stations (including Shanghai and Beijing) for a train between Shanghai and Beijing. How many different tickets do you need to prepare?
1+1+2+1+2+3+…+(1+2+3+…13+14)=560
How many kinds of hard seat tickets do you need to prepare for a round-trip train between Beijing and Shanghai that stops at 15 stations Do not copy other people's answers!
There are 15 stations in total, and each station has tickets to the other 14 stations
So there are 15x14 = 210 kinds
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A train goes through three stations from Beijing to Tianjin. How many tickets should this train prepare?
Combinatorial problem, 5 * 4 / 2 * 2 = 20
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