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CBSE Class 8 Answered

evaluatr (-2/7)^-4 × (-5/7)^2

 

Asked by hassantakhi100email | 24 Dec, 2020, 11:57: PM
Expert Answer
(-2/7)-4 x (-5/7)2
= (-7/2)4 x (-5/7)2  ... (Since (a/b)-m = (b/a)m)
= (7/2)4 x (5/7)2    
= (74/24) x (52/72)    (Since (a/b)n = an/bn )
= (72/24) x 52
= (49/16) x 25
= 1225/16
Answered by Renu Varma | 05 Jan, 2021, 11:35: AM
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