please help. thank you!

[boreal heart]

For the second figure;

Do you know how to find a definite integral?

ie, work out your lower and upper bounds, find the integral (this ones easy as you can apply the power rule) then apply the fundamental theorem of calculus

$$\int_a^b f(x) \mathrm{d}x=[F(x)]_a^b=F(b)-F(a)$$

[viscid hedge]

Woodie [Q77] - (MST210)

[hallow dust]

thank u

.solved

[shy remnant]

Solved

Post marked as solved by @hallow dust.

Use .unsolved if this was a mistake.

[boreal heart]

For the first figure;

In the limit as $n$ rectangles tends to what... equals the Riemann integral