7)Find a formula for the Riemann sum for f(x)-x2-2

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7)Find a formula for the Riemann sum for f(x)-x2-2.3 obtained by dividing the interval [-1,0 into n equal parts and using the right-hand endpoint for each ck. Then, take a limit of these sums as n → oo to calculate the area under the curve over [-1,0 8. Set up but do not evaluate the Riemann sum providing a lower sum approximation for the area under the curve f(x)-sin x + 1 on [-π, π] using n intervals of equal length. 9. Express the following limits as definite integrals (you needn't evaluate the integrals): n. ( o Σ cask where P is a partition of [0,2] (b) | limo Σ V a) lim k=1 4-c1Δε, where P is a partition of [O, 1] 1140 ?1 (c) | limo Σ sec(c)Δεk where P is a partition of [-/4,0] ?!