Question

find this question 7√7×7√7​

Answer 1

Answer:

7✓7 × 7✓7

= 343

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Answer 2

Answer:

Let x=7+7−7+7−........∞

⇒7+7−x=x

Squaring both sides, we get

7+7−x=x2

7−x=x2−7

Again squaring, we get

x4−14x2+x+42=0

Option C satisfies above equation.

Hence, the value of the expression is 3