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Anettt [7]
3 years ago
10

Evaluate ( x + 1)2-5 when x=-3

Mathematics
2 answers:
Luden [163]3 years ago
6 0
Parentheses first: -3+1 = -2
Multiply: -2*2=-4
Subtract: -4-5=-9
Final Answer: -9
Arturiano [62]3 years ago
6 0
(-3+1)2-5
(-2)2-5
-4-5
-9
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Step-by-step explanation:

The formula for the nth term of a geometric progression is

Un = ar^n- 1

The sum of the first six terms of a geometric series (U6) = 21/16

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21/16 = a × (-1/2 )^6- 1

21/16 = a ×(-2^-1)^5

21/16 = a × -2^-6

Cross Multiply

16 × a × -2^-6 = 21

a = 21/16 × -2^-6

a = 21/16 ×- 1/2⁶

a = 21/16 × -1/64

a = 21 ÷(-1/4)

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Step-by-step explanation:

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