AnswersPrecalculusTrigonometric Sum Identities — Cumulative examQuestion 62
62
RCMultiple Choice

Trigonometric Sum Identities — Cumulative exam

Question 62 • Precalculus

What is the binomial expansion of (x + 2y)7?

Answer
A
2x7 + 14x6y + 42x5y2 + 70x4y3 + 70x3y4 + 42x2y5 + 14xy6 + 2y7
B
x7 + 14x6y + 42x5y2 + 70x4y3 + 70x3y4 + 42x2y5 + 14xy6 + y7
C
x7 + 7x6y + 21x5y2 + 35x4y3 + 35x3y4 + 21x2y5 + 7xy6 + y7
D
x7 + 14x6y + 84x5y2 + 280x4y3 + 560x3y4 + 672x2y5 + 448xy6 + 128y7
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