UPSKILL MATH PLUS

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Find the sums given below:
 
(i) \(1+10\frac{1}{2}+14+...+84\) iii
 
(ii) \(34 + 32 + 30 + ... + 10 \)
 
(iii) \(− 5 + (− 8) + (− 11) + ... + (− 23)\)