I Evaluate lim x - 1x-x2-x3-xn-n-x-1ii Find the derivative text isqrt sin x- from first principle-

(i) n(n+1/2 (ii) cos x/2 √(sin x) ...

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Left Hand Derivative

i Evaluate li...

Question

(i) Evaluate ${lim}_{x \to 1} \frac{x + x^{2} + x^{3} + . . . + x^{n} - n}{x - 1}$

(ii) Find the derivative $\sqrt{sin x}$ from first principle.

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\frac{n (n + 1)}{2}

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