Question

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Answer 1

1. Tip

To find the value of

x

for which

{(−27)2}x×(−72)−1=−8343

use the formulae below:

If

(a)p=(a)q⇒p=q

(ab)−1=ba

Explanation

Given that

{(−27)2}x×(−72)−1=−8343



To find the value of x for which

{(−27)2}x×(−72)−1=−8343

Step 1

Equate,

{(−27)2}x×(−72)−1=−8343

⇒{(−27)2}x×2−7=−8343

⇒{(−27)2}x=−8×−7343×2

⇒{449}x=449

⇒{449}x={449}1

Step 2

Apply

(a)p=(a)q⟹p=q

∴x=1

Final Answer

If

{(−27)2}x×(−72)−1=−8343

then the value of

x=1

2. for the answer to ur 8th question refer the attachment

ALSO I VE ANSWERED IN UR AFTER QUESTION.!!