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Question Number 227489 by gregori last updated on 04/Feb/26

$$\mathrm{1}+\mathrm{2}−\mathrm{3}−\mathrm{4}+\mathrm{5}+\mathrm{6}−\mathrm{7}−\mathrm{8}+\mathrm{9}+\mathrm{10}−\mathrm{11}−\mathrm{12}+ \\ $$$$…\:+\mathrm{100}\:=? \\ $$

Commented by Tinku Tara last updated on 04/Feb/26

$$\mathrm{3}−\mathrm{7}+\mathrm{11}−\mathrm{15} \\ $$$$\mathrm{3}+\mathrm{11}+\mathrm{19}+\mathrm{27}+\mathrm{35}+..+\mathrm{195}− \\ $$$$\left(\mathrm{7}+\mathrm{15}+\mathrm{23}+…+\mathrm{199}\right) \\ $$$$\mathrm{These}\:\mathrm{are}\:\mathrm{two}\:\mathrm{arithmetic}\:\mathrm{progression} \\ $$$$\left.\mathrm{use}\:\mathrm{formula}\:\mathrm{to}\right]\mathrm{caclulate}\:\mathrm{sum} \\ $$

Answered by Simurdiera last updated on 04/Feb/26

$$\mathrm{0}\:? \\ $$

Commented by Tinku Tara last updated on 04/Feb/26

$$\mathrm{0}\:\mathrm{is}\:\mathrm{not}\:\mathrm{correct}.\:−\mathrm{ve}\:\mathrm{terms}\:\mathrm{are}\:\mathrm{larger} \\ $$

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