Question

Find
S7 of
1 + 0.2 +0.04....​

Answer 1

The ans is 1.24

...........................

Answer 2

Answer:

1.249984

Step-by-step explanation:

this is a geometric prog

r = 0.2

a = 1

sum of geometric prog = Sn = $\frac{a (r^n -1)}{(r-1)}$

S7 = 1(0.2^7 - 1)/ (0.2 -1 )

    = (128 x 10^-7) - 1 /( -0.8)

    = (-0.9999872)/ (-0.8)

    = 1.249984