cat que : the value of sum of first 75 terms of the sequence 150*2 + 148*4 + 146*6 + ... is ?

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cat que : the value of sum of first 75 terms of the sequence 1502 + 1484 + 146*6 + ... is ?

how to solve this type of question ?
approx. ans given in book is 292600

2007-03-10 01:32:08 · 2 answers · asked by Targeting C.A.T 1 in Science & Mathematics ➔ Mathematics

SIGMA[(152-2*i)(2*i)], for i = 1..75

SIGMA[304i-4i^2], for i = 1..75

INT[304i-4i^2]di, from 0..75

152i^2-(4/3)i^3, from 75...0

292,500

2007-03-10 02:54:28 · answer #1 · answered by RWPOW 2 · 0⤊ 0⤋

It seems to me that each term of that sum is equal to 152 .
so the sum of these terms is 152*75 =11400

your answer seems to important

2007-03-10 10:14:22 · answer #2 · answered by maussy 7 · 0⤊ 0⤋