Left Riemann Sum Expression

Question

Using the graph of $$f(x)=2*x+1$$ shown above, which of the following expressions correctly represents the left Riemann sum approximation with 5 equal subintervals over the interval [0,5]?

Accepted Answer

$$[f(0)+f(1)+f(2)+f(3)+f(4)]*\Delta x = (1+3+5+7+9)*1=25$$

Answer

$$[f(0)+f(1)+f(2)+f(3)]*\Delta x=(1+3+5+7)*1=16$$

Answer

$$[f(1)+f(2)+f(3)+f(4)+f(5)]*\Delta x = (3+5+7+9+11)*1=35$$

Answer

$$\frac{f(0)+f(5)}{2}*5=(1+11)/2*5=30$$

Rank	User	Correct Count	Attempt Count	Total Time	Score
#1	choiyejun0108	1	1	0m 00s	100
#2	aurorachris0601	1	1	0m 34s	66
#3	manyab1708	1	1	1m 07s	33
#4	kamalkaren31	1	2	1m 51s	-21
#5	kurniadisheryn	1	2	2m 14s	-44
#6	haneesh19.12	0	1	1m 43s	-113

Left Riemann Sum Expression

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