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Solve the following. a) If a = 2, b = 3 and c = -1, then find the value of 2ª + 3b - 5º. b) If a = 2, what is the value of a + 2ª + 4ª + 8ª ? c)/If x = 2, find the value of x + x² + x³ - x

power 4.​

1 Answer

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Explanation:

a) Using the values given, we have:

2ª + 3b - 5c = 2² + 3(3) - 5(-1) = 4 + 9 + 5 = 18

Therefore, 2ª + 3b - 5c equals 18.

b) Using the value of a = 2, we have:

a + 2ª + 4ª + 8ª = 2 + 2² + 4(2²) + 8(2²) = 2 + 4 + 16 + 32 = 54

Therefore, a + 2ª + 4ª + 8ª equals 54.

c) Using the value of x = 2, we have:

x + x² + x³ - x⁴ = 2 + 2² + 2³ - 2⁴ = 2 + 4 + 8 - 16 = -2

Therefore, the value of x + x² + x³ - x⁴ when x = 2 is -2.

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