Sum-0-7-0-71-0-72-to-100-terms-

Question Number 6328 by Rasheed Soomro last updated on 24/Jun/16

Sum 0.7 + 0.71 + 0.72 + \dots . to 100 terms .

Commented by FilupSmith last updated on 24/Jun/16

difference d = 0.01

arithmetic series :

∴ S = \frac{n}{2} (2 a + (n - 1) d)

n = 100, a = 0.7, d = 0.01

S = \frac{100}{2} (1.4 + 99 \times 0.01)

S = 50 (1.4 + 0.99)

S = 50 (2.39)

S = 119.5