Find the Sum of the Arithmetic Series $$\sum _ { j = 1 } ^ { 21 } \left( \frac { 2 } { 3 } j + 1 \right)$$

question 12

Multiple Choice

Find the sum of the arithmetic series. $$\sum _ { j = 1 } ^ { 21 } \left( \frac { 2 } { 3 } j + 1 \right)$$

• A) 154
• B) 88
• C) 175
• D) 155

Understand the role and types of relay contact faces in electrical circuits.

Explain the principles of electromagnetism as it applies to relay operation and magnetic circuitry.

Understand different types of temperaments in children and how they influence behavior and emotional responses.

Recognize the best fit between child temperament and their environment.

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