A software company sets up m number of computer systems to finish an assignment in 17 days. If 4 computer systems crashed on the start of the second day, 4 more computer systems crashed on the start of the third day and so on, then it took 8 more days to finish the assignment. The value of m is equal to: Sequence & Series (Mathematics) Question | DivineJEE

A software company sets up

m

number of computer systems to finish\n an assignment in 17 days. If 4 computer systems crashed on the start n of the second day, 4 more computer systems crashed on the start of the\n third day and so on, then it took 8 more days to finish the\n assignment. The value of

m

is equal to

If a_1, a_2, a_n are in A.P. where a_i>0 for all i show that &\frac{1}{\sqrt{a_1}+\sqrt{a_2}}+\frac{1}{\sqrt{a_2}+\sqrt{a_3}}+\cdots+\frac{1}{\sqrt{a_{n-1}}+\sqrt{a_n}}&=\frac{n-1}{\sqrt{a_1}+\sqrt{a_n}}

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