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Find the sum of the first 7 multiples of 4.

Class 10Sum of n Terms of an APAlgebra — Sequences

A112
B98
C120
D108

Step-by-Step Solution

Multiples: 4,8,...,28.

a = 4, d = 4, n = 7. S = \frac{7}{2}

[2(4)+6(4)] =

\frac{7}{2}

(32) = 7 (16) = 112

.

Answer: A) 112

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