Evaluate each sum that exists.
(a) $\sum_{i=1}^{25}(6-5 i)$
(b) $\sum_{i=1}^{6} \frac{7}{5}(5)^{i}$
(c) $\sum_{i=1}^{\infty} 5\left(\frac{7}{5}\right)^{i}$
(d) $\sum_{i=1}^{\infty} 7\left(\frac{5}{7}\right)^{i}$

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The Answer of Evaluate each sum that exists.
(a) $\sum_{i=1}^{25}(6-5 i)$
(b) $\sum_{i=1}^{6} \frac{7}{5}(5)^{i}$
(c) $\sum_{i=1}^{\infty} 5\left(\frac{7}{5}\right)^{i}$
(d) $\sum_{i=1}^{\infty} 7\left(\frac{5}{7}\right)^{i}$

Evaluate Each Sum That Exists ∑i=125(6−5i)\sum_{i=1}^{25}(6-5 i)∑i=125​(6−5i) (B) ∑i=1675(5)i\sum_{i=1}^{6} \frac{7}{5}(5)^{i}∑i=16​57​(5)i (C) ∑i=1∞5(75)i\sum_{i=1}^{\infty} 5\left(\frac{7}{5}\right)^{i}∑i=1∞​5(57​)i

Evaluate Each Sum That Exists $\sum_{i=1}^{25}(6-5 i)$ (B) $\sum_{i=1}^{6} \frac{7}{5}(5)^{i}$ (C) $\sum_{i=1}^{\infty} 5\left(\frac{7}{5}\right)^{i}$