Question

Find the infinite sum, if it exists: -3 + (0.6) + ( - 0.12)+ .. Preview

Answer 1

The infinite sum formula for GP is:

$\frac{a}{1-r}$

where a is the first term of GP and r is common ration.

For given list, a= -3 and r= -0.2

So, the infinite sum is:

$\frac{-3}{1-(-0.2)}$

$=-\frac{3}{1.2}$

$=-2.5$

So, the answer is -2.5

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