1.

2x - 1 + 2x + 1 = 320. Find the value of x.1. 62. 73. 84. 9

Answer» Correct Answer - Option 2 : 7

Given:

2x - 1 + 2x + 1 = 320. We have to find the value of x.

Calculation:

2x - 1 + 2x + 1 = 320

⇒ 2x/2 + 2x × 2 = 320

⇒ 2x(1/2 + 2) = 320

⇒ 2x × (5/2) = 320

⇒ 2x = 320 × (2/5)

⇒ 2x = 64 × 2

⇒ 2x = 128

⇒ 2x = 27

⇒ x = 7

∴ The required value of x is 7.



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