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miss Akunina [59]
3 years ago
14

I need help with part a and b

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
8 0
Ok, on part a you got the first part right.  (1/2)bh for the area of the triangle that is above the x-axis.  Now you have to subtract the triangle on the far right since it's below the x-axis.  From what I can tell in the picture, it has a height of -2 and a width of 1 so its area is -1.  Adding these two parts gives 9.
For B I'd say from [-5,-3] the graph of g(x) is increasing (you're still adding area as you go from -5 to -3 and since g(x) is concerned with the integral of f(x) it's getting bigger there) and the concavity is down.  The other interval is then [-3,2], for the same reasons
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