Question

Find the sum of 0.40+0.43+0.46+....+1 with step by step

Answer 1

Step-by-step explanation:

An = a + (n-1)d

1 = 0.40 + (n-1)(0.03)

0.60 = (0.03)(n-1)

n - 1 = 0.60/0.03

n - 1 = 60/3 = 20

n = 21

Sum of 21 terms of this sequence -

(0.40 + 0.43 + 0.46 +.................+ 1)

S(21) = 21/2 { 2(0.40) + (21-1)(0.03) }

= 21/2 { 0.80 + 20(0.03) }

= 21/2 { 0.80 + 0.60 }

= 21/2 * 1.40

= 21 * 0.7

= 14.7

Answer 2

Answer:

Step-by-step explanation: