10^15*10^7/10^19=10^22/10^19=10^3=1000
7^8/7*7^7=7^8/7^8=1
(-3)^5*(-3)^3/(-3)^7=(-3)^8/(-3)^7=-3
(0.2)^8*(0.2)^2/(0.2)^4*(0.2)^3=(0.2)^10/(0.2)^7=(0.2)^3=0.008
На графике область интегрирования.
S=∫3-0 [x+1-x²+2x-1]dx=∫3-0 [3x-x²]dx=3x²/2-x³/3=3*3²/2-3³/3-0=
=27/2-27/3=13.5-9=4.5