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## Question

secondary 4 | E Maths

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Please show step by step of how u get for part C) thanks u so much

u2 = 2¹ + 3 = 2^(2-1) + (2 x 2 - 1)

u3 = 2² + 5 = 2^(3-1) + (2 x 3 - 1)

u4 = 2³ + 7 = 2^(4-1) + (2 x 4 - 1)

See the pattern? It's always 2^(term number - 1) + (2 x term number - 1)

so for c) we're finding the nth term. It's just

un = 2^(n-1) + 2n - 1

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